Jenny is Brad's...
sister
John is Mike's...
dad
Pat is Carol's...
aunt
Alan is Carol's...
grandad
Carol is Anna's...
daughter
Jenny is Carol's...
cousin
Brad is Pat's...
son
Mike is Ted's...
brother
Mike and Carol are Ted's...
siblings
John is Jenny's...
uncle
Martha is Will's...
mum
Martha is Ted's...
grandma