Rhea Seehorn, who stars in the new animated comedy “The Harper House,” has much in common with Debbie Harper, her 2-D alter ego — starting with their first names.Seehorn’s real name is actually Deborah — Rhea (prounced “Ray”) is her middle name — though it’s a coincidence that series creator Brad Neely gave the same name to his lead character.“I don’t think it was until we were recording the third episode and I said, ‘My mom is really gonna get a kick out of this’ because I was called ‘Debbie’