About Tweyman Law

Tweyman Law is a family law firm with offices in Toronto and Oshawa. Its principal, Martin Tweyman, has practiced family law for more than 40 years, and the firm's associate lawyer, Vince Lai Yun Yeung, holds a Juris Doctor from Osgoode Hall Law School and a BA (Hons) from the University of Toronto. The firm's work covers custody and access disputes, child and spousal support, equalization of net family property, and divorce, and it also takes on wills and estates and real estate matters. Its approach, summed up in the firm's motto "Moving Life Forward," is to work toward settlement, though its lawyers say they're prepared to go to trial when a case calls for it.

Tweyman's family law experience reaches beyond the firm's own files. Tweyman has served as a panel member for the Office of the Children's Lawyer, contributed to the development of Ontario's Supervised Access Program, and spent more than 25 years on the Legal Aid Area Committee hearing appeals. Tweyman also helped pioneer the Parent Information Program, an early version of a course now required of separating parents in Ontario family court, and currently serves as a dispute resolution officer in Durham Region. Yeung is fluent in English and French, and worked as a legal researcher and volunteered with Pro Bono Students Canada and the Accessibility for Ontarians with Disabilities Act Alliance while in law school.

Milestones & recognition

  • Martin Tweyman has served as a panel member for the Office of the Children's Lawyer.
  • Martin Tweyman contributed to the development of Ontario's Supervised Access Program.
  • Martin Tweyman spent more than 25 years on the Legal Aid Area Committee, hearing appeals.
  • Martin Tweyman helped pioneer the Parent Information Program, an early version of a course now required of separating parents in Ontario family court.
  • Martin Tweyman currently serves as a dispute resolution officer (DRO) in Durham Region.

Good to know

A person using a wheelchairWheelchair accessibleA calendar with a checkmark beside a clockBy appointment

Who handles what

Offices 2

150 Ferrand Drive, Suite 504, Toronto, Ontario M3C 3E5

170 Athol St. E., Oshawa, Ontario L1H 1K1

The neighbourhood

The Oshawa office is at 170 Athol St. E., and the firm points clients to the Durham Region Courthouse as being "located minutes from our office," a fit for a firm whose principal also sits as a dispute resolution officer in the region's family court. The Toronto office is at 150 Ferrand Drive, Suite 504.

Frequently asked questions

Does Tweyman Law handle divorce and child custody cases?
Yes. Tweyman Law's practice centers on family law matters arising from relationship breakdown, including custody and access, child support, spousal support, equalization of net family property, and divorce.
Can Tweyman Law help calculate child support or spousal support?
Tweyman Law handles child and spousal support matters and points clients to the federal Child Support Lookup tool as a starting point for estimating what may be owed.
Does Tweyman Law only do family law, or also wills and real estate?
Besides family law, Tweyman Law also takes on wills and estates work and real estate matters.
Where are Tweyman Law's offices located?
Tweyman Law has two Ontario offices: one at 150 Ferrand Drive, Suite 504, in Toronto, and one at 170 Athol St. E. in Oshawa.
Is Tweyman Law close to the Durham Region Courthouse?
The firm describes its Oshawa office as located minutes from the Durham Region Courthouse.
Does anyone at Tweyman Law speak languages besides English?
Associate lawyer Vince Lai Yun Yeung is fluent in English and French.

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Listing compiled from the firm’s public website in September 2026. Verify licence status in the Law Society of Ontario directory ↗