About
William C. Trevillian Sr. is a seasoned attorney with more than 25 years of legal experience in Maryland. He has handled a wide range of matters and has represented thousands of clients over the years. His approach focuses on protecting client rights while providing clear guidance through complex legal situations.
William earned his J.D. from University of Baltimore School of Law, Baltimore, Maryland, where he graduated as valedictorian of his law class. He also earned a B.S. from University of Baltimore, Baltimore, Maryland. His academic background reflects strong dedication, discipline, and a deep understanding of legal principles.
William has built his career by working across many practice areas, including criminal law, DUI/DWI, and traffic violations. He also handles family-related matters such as divorce, custody disputes, and child support. His broad knowledge allows him to address different legal needs with confidence and care.
William also represents clients in business law, personal injury, estate planning, and real estate matters. By working in these areas, he helps individuals and families manage both immediate legal concerns and long-term planning. His experience allows him to offer practical solutions tailored to each case.
William is known for creating an environment where clients feel comfortable sharing their concerns. He understands that legal issues can be stressful, so he works to make the process clear and manageable. His goal is to ensure that every client feels heard and supported throughout their case.
William has also been active in the legal community through his service as a member of the Anne Arundel County Board of License Commissioners. In addition, he is a member of the Maryland State Bar Association and the Anne Arundel County Bar Association, reflecting his ongoing involvement in the profession.
William C. Trevillian continues to provide reliable legal representation backed by decades of experience. His commitment to client care, combined with his broad legal knowledge, helps individuals navigate challenging legal matters while ensuring their rights remain protected at every step.
Law Office Affiliations
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Attorney, Trevillian Law
- Member, Maryland State Bar Association
- Member, Anne Arundel County Bar Association
Licensed State
- Maryland
Education
- University of Baltimore School of Law
Juris Doctor (JD) - University of Baltimore
Bachelor of Science (BS)
Awards & Badges


- Corporate & Incorporation
- Assault & Battery
- Drug Crime
- DUI & DWI
- Parole & Probation
- Sex Crimes
- Violent Crime
- Adoption
- Alimony
- Child Custody
- Child Support
- Divorce & Separation
- Domestic Violence
- Marriage & Prenuptial Agreements
- Uncontested Divorce
- Animal & Dog Bites
- Brain Injury
- Car Accidents
- Construction Accidents
- Medical Malpractice
- Motorcycle Accidents
- Slip & Fall Accidents
- Spinal Cord Injury
- Trucking Accidents
- Wrongful Death
- Elder Law
- Workers' Compensation




