



When you run into legal problems, you need a gladiator who will fight for you and with you. Ohana Law Firm will fight for your rights from start to finish. We are committed to getting the best possible outcome for you at every step.



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Koren Banbury is a compassionate and dedicated attorney who advocates for clients navigating complex and deeply personal legal matters. At Ohana Law Firm, she guides clients through difficult transitions with empathy, clarity, and strong, strategic advocacy. Koren earned her Juris Doctor from the William S. Richardson School of Law at the University of Hawai‘i at Mānoa, where she served as Captain of the Phillip C. Jessup International Moot Court Team. She developed advanced skills in legal writing, oral advocacy, and litigation strategy, and earned a certification in International Law while remaining active in the Federal Bar Association. Koren has worked with the First Circuit Court of the Hawai‘i State Judiciary, gaining insight into courtroom proceedings and judicial decision-making. She also contributed to the Innocence Project, investigating claims of wrongful conviction and working to promote fairness and justice. Koren has participated in and led international service initiatives in Morocco, Kenya, and Uganda focused on public health, education, and community outreach, experiences that continue to shape her client-centered approach. She holds a Bachelor of Arts in International Relations and Global Affairs from Eckerd College, with minors in Middle Eastern and North African Studies, Arabic, and Law and Justice. Koren approaches each case with professionalism and genuine care, working to achieve practical, meaningful outcomes for her clients and their families.
Jamie C.S. Madriaga is an experienced litigator with more than a decade of experience handling complex disputes in Hawai‘i state and federal courts. At Ohana Law Firm, she represents clients in family law and civil litigation. Jamie has practiced in both private and public-sector settings and has served as a partner at Hawai‘i law firms. Throughout her career, she has represented clients in a broad range of complex civil cases, including commercial disputes, real property and land-use litigation, personal injury claims, and appellate proceedings. Her experience includes dispositive motion practice, depositions, mediation, settlement negotiations, arbitration, and developing litigation strategy. Earlier in her career, Jamie served as a law clerk to the Honorable Karl K. Sakamoto of the Circuit Court of the First Circuit and as a judicial extern to the Honorable R. Mark Browning, former Senior Judge of the Family Court of the First Circuit. After years of representing businesses, organizations, and public entities, Jamie transitioned to family law to work more directly with individuals facing deeply personal legal issues. Her broad litigation background brings a practical and strategic perspective that helps clients navigate the personal, financial, and practical challenges that can arise during these disputes. Jamie earned her J.D., cum laude, from Case Western Reserve University School of Law and her B.A. from the University of Virginia. She is admitted to practice in all courts of the State of Hawai‘i, the U.S. District Court for the District of Hawai‘i, and the U.S. Court of Appeals for the Ninth Circuit. Jamie serves as an At-Large Director of the USTA Hawai‘i Pacific. Outside of work, she enjoys playing tennis, traveling, and spending time with her dog, Guinness.
Our team of seasoned attorneys is dedicated to carefully listening to your concerns, ensuring a deep understanding of your unique situation.
Choose a convenient date and time that works best for you. Our experienced lawyers are available to discuss.
During your consultation, you'll have the opportunity to discuss your case with a qualified attorney.
Based on the information gathered during your consultation, we'll develop a tailored legal strategy to help you.
Andrew Nguyen is an experienced attorney in real estate, estate planning, and probate matters. He joins Ohana Law Firm after working for the largest title insurance agency in Colorado. He was admitted to the Hawaii bar in 2015 and has built a practice around helping clients with clear and concise legal advice.
Sarah DiMarzo is an enthusiastic, compassionate advocate for every client she meets, each of whom benefits from her extensive experience and unmatched professionalism. She is passionate about serving others, which she has demonstrated for nearly two decades. Sarah graduated with a Juris Doctor from Michigan State University School of Law. She also has a Bachelor of Arts from Penn State. She has represented hundreds of indigent and under-resourced clients. She continued her public service as a member of the U.S. Navy JAG Corps, where she served six years on active duty. During those six years, she split her time between legal assistance (i.e. Family law and landlord-tenant issues) and criminal defense. Sarah has handled complex civil litigation matters for Perkins Coie, one of the nation’s top law firms. As a new attorney in 2010, Sarah was an associate at one of Michigan's top law firms, Warner Norcross & Judd in Grand Rapids, Michigan. She spent nearly three years practicing bankruptcy, environmental law, and products liability. Sarah is a member of the state bars in Michigan, Washington, and Hawaii. She is a veteran and military reservist. She is also a wife to a submarine veteran and a mom to two young daughters.

I used William Dean as a probate attorney in a family trust case He wasn't able to resolve my issue through no fault of his own However he was incredibly kind, thoughtful and willing to take the case When it became apparent my case was not going to work out, he returned soos of my retainer without being asked Family, friends all said I threw my money away, but William Dean came through for me with his integrity

Mr. Dean and his associates handled my case with ease. il was a neighbor dispute and may have seemed a minor issue to other law firms, but Ohana Law was fair and balanced in their assessment of possible assistance William proceeded to outline the procedure, the cost, and the possible outcomes. Very good communication land he will actually call on a Saturday!) wholeheartedly recommend Ohana Law Firm!

William Dean is an honest straightforward trustworthy attorney and without him and his team I would have not been able to secure the custody of my children. Right from the start/was ensured by Mr.Dean that legally everything would work in my favor I just followed his instructions and let him cover the details so I didn't have to constantly stress about the case. This has been a very difficult and exhausting process and without Mr.Dean it would have been unbearable. I am so thankful! Another father gets reunited with his kids, it doesnt get any better!

Special thanks to William Dean who was present every step of the way with whatever questions and coricerns we had. Fell al much ease when dealing with our case. What an amazing & trustworthy team at Chana Law Firm Cannot say thank you enough!

Positive Professionalism. Quality. Responsiveness Value We asked Mr. William Dean to help us with evaluating a real estate purchase This was a nice experience. Wiitiam is a smart and knowledgeable lawyer. Many other attorneys I had worked with in the past, let their education and experience get in the way of communicating with their cient William is among the few that standout in being good listeners and efficient communicators He listened carefully, identified our concems and categorized them in degree of relevance and importance. He then researched the facts efficiently and collected a full picture that was missing in the 3rd party's litte report. His help was essential for making our final decision with confidence I highly recommend him

Knowledgeable. Compassionate Responsive Professional. Ohana Law firm helped me see options when I saw none in the storm I was facing I couldn't be more grateful for such excellent care and expertise from both William and Lynne. They both went the extra mile to make sure everything was taken care of promptly and effectively. Thank you for everything