If you administrator his DNA you can attach it to him on your tree. That's what I did with my Dad and maternal uncle. I'd definitely do DNA for yourself too! I have recently sent my husbands brother a Y-DNA test so we are hoping to break through a few Dailey brick walls of our own! (We did FTDNA and joined the Daly Surname Project!) he had already done the autosomal Ancestry test for us! Blessings!!!