Carranam and the concept of the Anam Cara/Anamchara

Anam Cara is a phrase that refers to the Celtic concept of the "soul friend" in religion and spirituality. The phrase is an anglicization of the Irish word anamchara, anam meaning "soul" and cara meaning "friend".

I love John O’Donohue’s book on this subject and I think this must be in part where the carranam concept comes from, maybe?