This category is for all members of the Thomas family.
“ [Source] Dean Thomas had several Muggle half-siblings. They were the children of Mr. and Mrs...Dean Thomas's half-siblings
“ [Source] Mrs Thomas was the mother of Dean Thomas. Though she was a Muggle, her first husband...Dean Thomas's mother
“ [Source] Mr Thomas was the Muggle stepfather of Dean Thomas. He married Dean's mother some time...Dean Thomas's stepfather