Our Baltimore and South Baltimore Attorneys

Residents of the Annapolis, Bowie, Glen Burnie, Pasadena and Serverna Park areas have trusted their legal concerns to William C. Trevillian, Sr.for more than 25 years.



William C. Trevillian Sr., has been practicing law in the Greater Balitmore area for more than 25 years. He is a graduate of the University of Baltimore School of Law where he was valedictorian of his law class. He has represented thousands of clients in many different areas of law including criminal, DUI/DWI, Traffic Violations, adversarial and contested divorce and separation, child custody and visitation disputes, business law, personal injury, estate planning, state administration, and real estate law. Through his vast knowledge of the law he has built a law practice in Glen Burnie, and Severn, were clients fell comfortable discussing their legal matters because they know that all of their rights are being protected. William C. Trevillian Sr., has served as a member of the Anne Arundel County Board of License Commissioners and is a current Member of the Maryland State Bar association and the Anne Arundel County Bar Association. He is admitted to practice law in Maryland and the United States District Court.

Areas of Practice

  • Elder Law
  • Family Law
  • Medical Malpractice
  • Motor Vehicle Accidents
  • Personal Injury
  • Prenuptial and Postnuptial Agreements
  • Worker’s Compensation



William C. Trevillian, Jr. graduated from the University of Baltimore School of Law with honors in 2004. He concentrates in Adversarial and Contested Divorce and Separation, Child Custody, Criminal, Traffic and Personal Injury Law. He served as chief counsel for the Anne Arundel County Personal Board and is a member of the Maryland Association for Justice, Maryland State Bar, Federal District Court for State of Maryland, and Anne Arundel County Bar Association. He is admitted to the practice of law in Maryland and the U.S. District Court for the State of Maryland.


  • University of Baltimore School of Law, Baltimore, Maryland

Areas of Practice

  • Divorce, Separation and Alimony
  • Child Support
  • Child Custody & Visitation
  • Criminal Law
  • Personal Injury

Bar Admissions

  • Maryland, 2004
  • U.S. District Court District of Maryland

Affiliations and Associations

  • Maryland State Bar Association
  • Anne Arundel County Bar Association
  • Maryland Association for Justice
  • Prior – Counsel for the Anne Arundel County Personal Board



Rebecca S. Trevillian graduated from George Mason University School of Law in 2004, was admitted to practice law in the State of Maryland in December 2004, and has 10 years of experience related to family law cases. After her graduation from law school, she clerked for the Honorable Karen H. Abrams on the St. Mary’s County Circuit Court from August 2004 through August 2006. During her clerkship, Rebecca was exposed to many of types of cases, but the majority of her time was spent focusing on assisting Judge Abrams in rendering decisions in divorce, child custody, child visitation, property, and child support cases.

Rebecca was a senior associate in an Annapolis law firm from August 2006 through July 2014, where her concentration was family law, including custody, divorce, visitation, child support, contempt, modification, separation agreement, prenuptial agreements, as well as protective orders. Rebecca is certified to mediate custody, visitation, child support, property, and alimony issues, and can provide mediation services for individuals as a cost-effective alternative to litigation.

Rebecca is a member of the Anne Arundel County Bar Association, Maryland State Bar Association, Howard County Bar Association, and Maryland Program for Mediator Excellence, as well as a Court Approved Custody and Visitation Mediator for Anne Arundel and Howard County.

The Trevillians serve Anne Arundel County, Baltimore County, Howard County, Baltimore City, and the cites of Severn, Glen Burnie, Annapolis, Pasadena, Crofton, Odenton, Jessup, Ellicott City, Laurel, Catonsville, Severna Park, Randallstown, Dundalk, Arnold, Bowie, Ferndale, Rivera Beach, Brooklyn Park, Fort Meade, Linthicum and Crownsville, Millersville.

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Our Values

  • Local Practice
  • Experienced, Proven Team
  • We Know The Local Courts
  • Free Consultations