Ehren

 was the son of Saint Monica, born in the Great Lanta.

Background
Eventually, slavers raided Great Lanta and Monica was separated from Ehran. She went from slave master to slave master, never giving up hope that she would see her son again. Eventually, she found her son - as a slave owner himself. He blamed her for the childhood he had lost to the slavers, and beat her daily. Yet, no matter how hard he beat her, she would simply smile and say "I forgive you". This ate away at Ehran, until one day when he realised the errors of his ways and freed all of the slaves he owned.

However, there is nothing concrete about Saint Monica's story, so it's possible Ehran is a fabrication thought up by Father Clifford.

Appearances
is only mentioned in Fallout 3.