His death record has his name as Andrew Johnson Warren, but that may be a typo or transcription error. Wife is listed as Margaret Thomas.
The death record of one of their children lists her as Mary Margaret Thomas.
EDIT: Just wanted to let you know that there is a very useful tool on the lower right portion of the profile page. It's a link to do a RootsSearch. There are some sites available to search once the page opens, but some of them are premium sites. I have a couple of subscriptions to premium sites but I always go with FamilySearch first. It's free, and that means anything you link from there can be seen by all WikiTreers.