Nancy M. Bonniwell

Nancy M. Bonniwell is an attorney at von Briesen & Roper, s.c. who serves clients from the firm’s Waukesha and Milwaukee offices. She focuses on estate planning, estate and trust administration, business succession, marital property planning, and business law. Her practice also includes fiduciary litigation, inheritance disputes, elder and special needs law, nonprofit and tax-exempt matters, and tax planning. She helps individuals, families, business owners, and fiduciaries address important legal and financial decisions with practical guidance.

Nancy earned her J.D. from the University of North Dakota and her B.S., with honors, from the University of Wisconsin. She is admitted to practice in Wisconsin and before the U.S. District Courts for the Eastern and Western Districts of Wisconsin. Her legal education and broad experience support her ability to evaluate estate, tax, business, and family concerns and develop coordinated plans that reflect each client’s circumstances, priorities, and long-term goals.

Nancy advises clients on the preparation and administration of trusts and estates, the transfer of family wealth, and the succession of closely held businesses. She also assists with marital property planning, fiduciary responsibilities, inheritance conflicts, and planning for older adults and individuals with special needs. Her business law experience allows her to consider ownership, governance, tax, and continuity issues alongside personal estate planning, helping clients create strategies that work across multiple areas of their lives.

Nancy M. Bonniwell has been recognized in The Best Lawyers in America for trusts and estates law from 2012 through 2026 and received the Greater Milwaukee Foundation’s Outstanding Advisor of the Year Award in 2014. She is a Fellow of the Wisconsin Law Foundation and a former president of the Waukesha County Estate Planning Council. Her civic service includes roles with conservation, charitable, planning, and local government organizations. Through careful planning and clear communication, she helps clients protect assets, prepare for transitions, and carry out lasting objectives.

Law Office Affiliations

• Attorney, von Briesen & Roper, S.C.
• Member, Waukesha County Bar Association
• Member, Milwaukee Bar Association
• Member, Association for Women Lawyers

Licensed State

• Wisconsin

Education

• University of North Dakota
  Juris Doctor (JD)
• University of Wisconsin
  Bachelor of Science (BS)