カルラ (ka ru ra), and カーラ (kaa ra) are both correct to use, but I would go for the former.
Carla is the same in Irish as it is in English
Carla
Carla Lavatelli has written: 'The work of Carla Lavatelli' -- subject(s): Catalogs 'Carla Lavatelli'
Carla Nickerson's birth name is Carla Nickerson.
Carla Vila's birth name is Carla Villacorta.
Carla Mercy's birth name is Carla Murzi.
Carla Ferrigno's birth name is Carla Green.
Carla Ibbotson's birth name is Carla Durre.
Carla Bley's birth name is Carla Borg.
Carla Boni's birth name is Carla Gaiano.
Carla Leone's birth name is Carla Ranalli.
there are many carla brocks