[quote=@PrinceAlexus]
[@Gisk]

It could link but i coukd generify it abit more if the information clashes.

Does not have to be a 3rd in line, but theirs only male heirs left to marry or be betrothed too. An twin brother and younger brother. 
[/quote]

It wouldn't work, my character's father is the one married, and has been for longer than either twin has been alive. 

Isabelle would have to be someone's aunt or second cousin or something of the sort.