Is Jr or Sr part of legal name?
Mia Russell
Updated on April 10, 2026
Simply so, is SR a legal name?
Rule #1: Parent & Child with Same Name = Sr. + Jr. Any parent and child with the exact same legal name can be referred to as “(Name), Sr.” and “(Name), Jr.” Below, Barnabas Ludwig Johnson named his son Barnabas Ludwig Johnson also, so they can be called Barnabas Ludwig Johnson, Sr., and Barnabas Ludwig Johnson, Jr.
Similarly, is JR Part of last name or first name? "John Doe Jr." means he is John, the son of John. In a full name listing, the suffix follows the last name because the person is primarily known by is given name and surname, the suffix being a secondary piece of information.
Just so, is JR a legal name?
It's the fact that unlike 'Sr. ' and various prefixes such as 'Mr. ' and 'Mrs.,' the suffixes 'Jr. ' and 'III' are actually part of a person's official, legal name.
Do you legally have to change your name to SR When you have a child named JR?
A man with the same name as his father uses “Jr.” after his name as long as his father is alive. His father may use the suffix “Sr.” for “senior.” The son may either drop the suffix after his father's death or, if he prefers, retain it so that he won't be confused with his late father.