Born
John Charles Julian Lennon in 1963, it wasn't until 2020, at age 57, that he legally changed his name to
Julian Charles John Lennon to better match the name he'd always been known by, to assert his own identity. Official documents, including travel tickets, had always emphasized his legal first name,
John. After receiving his comparatively meager trust fund after adulthood, Julian had to sue his father's estate only to settle out of court after 17 years of litigation for a very small percentage.
Ironically, the elder John had hard feelings for his own absentee father, Alfred, or Freddie, yet didn't do much better for his own first born son. This from his heart wrenching song "Mother":
... ...
Father, you left me, But I never left you
I needed you, You didn't need me
So, I, I just got to tell you, mm, Goodbye
... ...
Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, Mama don't go, Daddy come home, ... ... ...