Possible Clues:

• A relative right in the midst of trouble
• A sibling
• A sibling for 15, or a colleague of Cadfael?
• Monk runs into trouble
• Union member - male relative
• A relative is right in trouble
• George, to Jeb
• Support denied a different family member
• Gee, it's a nuisance having the rain coming in
• He's a relatively different sort of person in 20 down