Matheu D. Nunn

New Jersey

Einhorn, Barbarito, Frost & Botwinick, PC
165 East Main Street
Denville, NJ 07834
United States

Tel: +1 973-586-4910


Matheu D. Nunn, is a Partner and Board Member of Einhorn, Barbarito, Frost & Botwinick, PC, a leading full-service law firm based in Denville, New Jersey. Mat co-chairs the firm’s general Appellate Practice and the Family/Matrimonial Practice.

Mat has a wide array of experience representing individuals from all fields, including but not limited to: athletes, business owners, entertainers, executives, financial services, lawyers, physicians, police officers, and teachers—as well as the spouses of individuals in those fields.

A former county and municipal prosecutor, Mat is an experienced litigator; he has tried jury and bench trials and has been counsel in more than 70 Appellate Division and Supreme Court matters, including precedent-setting decisions in Cardali v. Cardali, 255 N.J. 85 (2023) (cohabitation), Facebook v. State, 254 N.J. 329 (2023)(privacy rights of defendant’s Facebook messenger communications), Lapsley v. Sparta, 249 N.J. 427 (2022)(regarding premises liability), Bisbing v. Bisbing, 230 N.J. 309 (2017) (child relocation), Quinn v. Quinn, 225 N.J. 34 (2016) (cohabitation), In re J.E.V., 226 N.J. 90 (2016)(adoption), and Clark v. Clark, 429 N.J. Super. 61 (App. Div. 2012) (financial malfeasance). Mat’s noteworthy victories have earned him numerous awards and recognitions, including consecutive selections as a New Jersey Law Journal “Attorney of the Year” finalist.

Prior to joining Einhorn Barbarito, Mat clerked for the Morris County Assignment Judge, the Hon. B. Theodore Bozonelis, A.J.S.C. (ret.), and then at the Appellate Division for the Hon. Jack M. Sabatino, P.J.A.D.

Bar Admissions
  • New Jersey, 2007
  • U.S. District Court of New Jersey, 2007
  • Rutgers School of Law, J.D., 2007
    • Academic Honors, Notes and Comments Editor of Law Review
  • University of Delaware, B.A., 2003

In many cases, a trial court decision is not the end of litigation – it is just the beginning. In New Jersey, after a trial court judge renders a decision, either party has a right to file an appeal with the Appellate Division of New Jersey. Thereafter, on occasion, the seven Justices of our New Jersey Supreme Court may, either by choice or by constitutional mandate, review all or some of the issues presented to the Appellate Division.

The Firm’s Appellate Practice Group is currently chaired by Partner, Bonnie C. Frost, Esq., with the assistance of her co-chair, Partner, Matheu D. Nunn, Esq. The duo of Frost and Nunn regularly handle emergent and non-emergent matters before the Appellate Division and Supreme Court. Their efforts across a wide-range of subject matters have resulted in a number of recent precedent-setting decisions, including the landmark child relocation case of Bisbing v. Bisbing; a case of first-impression regarding cohabitation and termination of alimony in Quinn v. Quinn; a contested adoption case of first impression in In re Adoption of a Child by J.E.V.; and a case of first-impression involving a special needs person in J.B. v. W.B. Overall, the Firm’s Appellate Practice Group has prevailed in 19 cases that its attorneys initiated or handled before the New Jersey Supreme Court, including the noteworthy “firefighters’ rule” decision of Ruiz v. Mero and the Supreme Court’s decision in State v. Dispoto.

The members of the Appellate Practice Group also: serve as co-counsel on appeals with other lawyers; are active in writing and/or arguing in amicus efforts for both the New Jersey State Bar Association and the American Academy of Matrimonial Lawyers; and regularly lecture with Justices, judges, and practitioners regarding appellate and Supreme Court practice. Additionally, the attorneys in our Appellate Practice Group are skilled in handling appellate arbitration of issues previously tried by arbitrators.

Established in 1961, Einhorn, Barbarito, Frost & Botwinick, PC, based in Denville, New Jersey, is a comprehensive, full-service law firm devoted to serving a broad range of legal needs. In our more than 60 years in business, our attorneys have earned a reputation for dedication to the legal profession and to the community. We are proud of the depth of our experience, creativity, and acumen in assisting clients through all of the stages of their lives and all of the phases of their business.

Our firm represents a diverse base of clients from individuals and families to public and private companies, entrepreneurs and long-standing institutions. We employ multi-disciplinary teams on behalf of clients to leverage experience in specialized areas of concentration including employment law, commercial litigation, personal injury and workers’ compensation, matrimonial matters, zoning issues, estate planning, criminal law, and tax law.

We handle a spectrum of cases—from the straightforward to the complex. Regardless of the size of the case, each client receives the same level of excellent, thoughtful and compassionate legal counsel. In complicated cases, the knowledge, skill and experience of a partner are often paired with the collaboration of an associate attorney to ensure that the matter is handled in the most cost-effective manner possible.

Clients rely on our attorneys because they know we provide the responsiveness of a local firm with the effectiveness of a regional powerhouse. We are there to grow with our clients…for success now and in the future, regardless of what life, business or other circumstances bring.