About Williams & Williams Law

Williams & Williams Law is a family law firm in downtown Oshawa, founded by identical twin sisters Sabrina Williams and Diana Williams. Sabrina earned a law degree from De Montfort University in Leicester, England, graduating in July 2011. Diana earned a law degree from De Montfort University in the United Kingdom, graduating in 2011. Both then returned to Canada and completed the National Committee on Accreditation process before qualifying to practice in Ontario. Sabrina was called to the Bar of Ontario in January 2016 after articling with a family law sole practitioner in Toronto. Diana followed in 2018, after articling alongside a family law lawyer and at a firm that practices family law exclusively.

Since being called to the bar, both lawyers have built their practice around family law, handling cohabitation agreements, marriage contracts, separation agreements, custody and support matters, and contested and uncontested divorces. Diana has expanded into immigration law, concentrating on spousal sponsorship applications for couples separated by the immigration process. Sabrina has added wills and powers of attorney work alongside the family law practice. Beyond representation, the firm offers notarization, commissioner of oaths services, and unbundled legal services for clients who need help with a single step of their matter rather than an entire case.

Good to know

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This firm’s lawyers at a glance

Called to the bar
2016–2018 · median 9 years in practice 2 of 2 lawyers
Law schools
De Montfort University (2) 2 of 2 lawyers

Where to find them

111 Simcoe Street North, Suite 300, Oshawa, Ontario, L1G 4S4 · 905-240-8020

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This listing was generated by AI from public sources in September 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

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