Cinder Dog, if your Dad likes the name 'Stray', but the Angels say he has to have another one, there's a way they both can have what they want. We nearly always call you 'Cinder Dog', so you have a two-handled name. Well, think about giving Stray a two-handled name, too..like Stray Boy. The Angels can know him by the second bit, but to you & Dad & Boots & everyone else, he'll keep the 'Stray' part, too. You sort of need a short name for the second bit...Stray Pal, Stray Mate, Stray Bo. Stray Dude...well, keep thinking.
Remember to tell us what is happening.
Oh...& don't forget to start writing your book.