I would guess from the day he was born!
Ira Spiegel's birth name is Ira Allen Spiegel.
Ira Tucker's birth name is Ira B. Tucker.
Ira Wallach's birth name is Ira Jay Wallach.
Ira Louvin's birth name is Lonnie Ira Loudermilk.
Ira Levin's birth name is Ira Marvin Levin.
Ira Einhorn's birth name is Ira Samuel Einhorn.
Ira Heymann's birth name is Heymann, Ira Philip.
Ira Heiden's birth name is Ira Mathew Heiden.
Ira Leslie's birth name is Ira F. Leslie.
Ira Reiner's birth name is Ira K. Reiner.
The name Ira or the I.R.A.? In Irish the name "Ira" is "Íreá". The I.R.A is "Óglaigh na hÉireann"
Ira