I do not believe Caillou's last name is Boris because Boris is his dad's name. Therefore, while not unheard of, his dad's name would be Boris Boris and his mom's married name would be Doris Boris. I am thinking this is not the case. I do not believe Caillou's last name has ever been mentioned (at least not on the tv series).
Boris, his last name is Boris. because every family member has the same name. Or he was adopted and changed his name. I know it doesn't make sense, But you can. don't judge someone before you get to know them.
Caillou does not have a last name cause they never said it in the show
His dads last name is Styles like Harry. Harry never took his step dads last name... Yet.
His name is dracula #2
no there not his real dads name is Jeremy bieber, his step dads name isn't Jeremy
my dads name is tony and my is thomas
her dads name is mather
Her dads name is Samuel Griscom
his dads name is Michael godfrey
Chief Powhatan was Pocahontas's dads name.
Slash's dads name is Anthony Hudson
His dads' name is Pete Hernandez