https://www.proz.com/kudoz/english-to-french/law-patents/539...

Le 17 novembre 2005 le juge du tribunal des successions et des affaires familiales du compté de Norfolk,
https://www.legifrance.gouv.fr/affichJuriJudi.do?idTexte=JUR...

On trouve aussi
LE TRIBUNAL DES SUCCESSIONS ET DES TUTELLES DU COMTE DE NEW-YORK
https://www.legifrance.gouv.fr/affichJuriJudi.do?idTexte=JUR...

ça dépend des compétences de ce tribunal qui change suivant les Etats. Avez-vous l'Etat ? Mais ce qui revient c'est tribunal des successions.

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Note added at 1 hr (2020-02-15 09:35:54 GMT)
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*qui changent*

.

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Note added at 2 horas (2020-02-15 10:28:43 GMT)
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Cour des orphelins dans le Tribunal des successions (Maryland et Pennsylvanie)

Cour des successions en Angleterre et au Canada

Orphans' Court handles disputes and administrative matters relating to successions, inheritances, trusts, and everything to do with guardianships and similar things (e.g. powers of attorney). The list is LONG, but as long as your translation references both estates/successions and guardianships, it's accurate.

But Orphans' Court is NOT the same as Family Court. For example, Pennsylvania is one of the states that has an Orphans' Court. They also have a Family Court. Here are links explaining the competencies of each court:

Family Court - https://www.courts.phila.gov/common-pleas/family/
"The Juvenile Branch [of Family Court] has jurisdiction over delinquency, dependency, termination of parental rights and adoption proceedings. Domestic Relations deals with paternity, support, custody, visitation, and divorce. Domestic Violence cases are also assigned to the Domestic Relations Branch."

Orphans Court - https://www.courts.phila.gov/common-pleas/orphans/
"The Orphans' Court... serves to protect the personal and property rights of all persons and entities who are otherwise incapable of managing their own affairs.

The Court's jurisdiction extends to minors, incapacitated persons, decedents, trusts, principals and agents under powers of attorney, non-profit charitable organizations, cemetery companies, inalienable property and marriage licenses. The Court appoints guardians for minors and incapacitated persons to handle their financial affairs and/or their health and safety needs. The actions and accounts of fiduciaries, including guardians, agents under powers of attorney, executors, administrators, and trustees are examined and audited. The Court hears disputes involving inheritance and estate tax and marriage license issues. Questions regarding the administration and distribution of the decedents', minors' and incapacitated persons' estates, testamentary and inter vivos trusts, special needs trusts, non-profit corporations organized for charitable purposes, as well as Appeals from the Register of Wills are adjudicated and resolved. Settlements of actions involving minors, incapacitated persons, decedent's estates and wrongful death and survival beneficiaries are reviewed. Authorizations to act as an approved corporate fiduciary are issued by the Court."