People John Cassidy John Cassidy John Cassidy from . About Family Children He has two children, Clare and Margaret (72) . Other facts about John Cassidy Family name Cassidy. Show people with the surname Cassidy Given name John John Cassidy's Children (2) Clare Catherine Maud Cassidy Margaret Cassidy, 72 Comments There are no comments yet. Enter your name here: Enter your email here: Enter your message here: Your message is required. Markdown cheatsheet. Submit