Ann Hetherwick Cahill


F: (617) 849 7235
Overview Insights News Education and Credentials Recognition and Community


Ann Hetherwick "Hether" represents beneficiaries and fiduciaries in fiduciary, probate and trust disputes. Her practice focuses on probate, trust, equity, guardianships, and conservatorship litigation. Hether also serves as trustee of private trusts and personal representative of estates.

Hether advises clients at every stage of litigation, sometimes avoiding litigation entirely or resolving issues through mediation. As a former law clerk of the Massachusetts Appeals Court, she brings her strong writing skills and knowledge of the appellate process to contested matters, trials, and appeals. Above all, Hether appreciates that clients are often going through a difficult time of their lives and their legal and emotional needs are unique.

Hether handles wide-ranging probate and trust disputes, including:

  • trustee removal actions, defense and prosecution;
  • will contests and trust invalidity actions involving undue influence, lack of capacity, and/or formation issues;
  • trust modification, termination, reformation, cy pres, and/or interpretation actions;
  • accounting actions;
  • omitted spouse or child actions, including DNA and exhumation issues;
  • equity actions involving real estate;
  • complaints for instructions and/or declaratory judgment actions;
  • divorce, including issues whether a trust is divisible as a marital asset;
  • conservatorships, including expanded authority to perform estate planning; and
  • guardianships and financial exploitation.



Education and Credentials

Suffolk University Law School, J.D.
Skidmore College, B.A.
Commonwealth of Massachusetts
U.S. Court of Appeals for the First Circuit
U.S. Court of Appeals for the Fourth Circuit
Massachusetts Bar Association
Massachusetts Law Review, Articles Editor, 2020-Present; Case Comment Editor, 2017-2020; Book Review Editor, 2015-2017; Associate Editor, 2014-2015
Boston Bar Association, Fiduciary Litigation Section, Co-Chair, 2018-2020
Boston Bar Association Steering Committee for the Beacon Award for Diversity and Inclusion, 2019
Boston Chamber of Commerce Women's Leadership Program, 2016-2017
Boston Probate and Estate Planning Forum
Boston Estate Planning Council
Trusts and Estates Consortium, Technology Co-Chair, 2016-2018

Recognition and Community


No aspect of these advertisements has been approved by the highest court of any state. See Awards Methodology.

Selected to The Best Lawyers in America list of Ones to Watch (Woodward/White, Inc.) for Family Law, 2024; Litigation – Trusts and Estates, 2024

Selected to the list of Massachusetts Lawyers Weekly's "Top Women of Law," 2020

Selected to the list of Massachusetts Super Lawyers (Thomson Reuters), Estate and Trust Litigation, 2020-2023

Selected to the list of Massachusetts Super Lawyers Rising Stars (Thomson Reuters), Estate and Trust Litigation, 2009, 2011-2012, 2017-2018

Participated in the Boston Chamber of Commerce Women's Leadership Program, 2016-2017


Brookline Community Foundation, Professional Advisors Committee, Vice-Chair

The Mount, Boston Committee

Certified Bar Association of Norfolk County Pro Bono Conciliator

Ran Boston Marathon with Team Brookline, 2019