I'm responding to both you and Ninor. As stated above, my grandson is named
Abraham and his mother was brought up with no religious training by both her atheist father and atheist myself, and is herself an atheist. As far as
Abraham's father goes, I don't know that he's an atheist, but he is definitely not a religious person, does not attend church, never talks about religion, and liked to call the very very large church nearby "The Repentagon." They never worried that the use of the name would lead to the assumption that they are religious and I don't think it ever has. I normally don't argue with people's impressions of names, but in this case I have some personal experience so I thought it might be actually useful to the OP.