Beau Brady's birth name is Beau Jean Brady.
Brady Westwater's birth name is Shockley, Ross.
Brixton Brady's birth name is Elizabeth Fisher.
Marcia Brady's middle name was never mentioned in the show, therefore there is no way of telling. Her birth name was mentioned and that happens to be Marcia Martin.
When the credits rolled, it was "Pat Brady as himself"
Danna Brady's birth name is Danna Marie Brady.
Buff Brady's birth name is John Brady.
Brady Kirchberg's birth name is Brady Cooper Kirchberg.
Brady Anderson's birth name is Brady Kevin Anderson.
Brandon Brady's birth name is Brady, Nicholas Brandon.
Karren Brady's birth name is Karren R. Brady.
Moya Brady's birth name is Kathleen Moya Brady.
Terence Brady's birth name is Terence Joseph Brady.
Brady Brogni's birth name is Maurice Brady Brogni.
Brady Willard's birth name is Brady Garrison Willard.
Brady Finta's birth name is David Brady Finta.
Beau Brady's birth name is Beau Jean Brady.