New York Petition for Family Change of Name — Supplemental is a legal document used by residents of New York State to request a change of name for themselves and/or their family members. This petition is required when an individual or family wishes to change a name that is different from their birth name. The Supplemental petition can be used to change the name of an adult, a minor, or a family unit. There are three types of New York Petition for Family Change of Name — Supplemental: an adult petition, a minor petition, and a family petition. The adult petition is used for an individual who is over the age of 18 and wishes to change their name. The minor petition is used for a minor under the age of 18 who wishes to change their name, and the family petition is used to change the name of an entire family.