Timothy --> Mitty
Peregrine --> Hawk,
ReggieJames -->
Jay,
Jem,
Jamie,
Jake (
James is the English form of
Jakob)
Louis --> Luddie
Gregory --> G,
Rory, Jordie
Martin -->
MarsPeter --> Rock
Patrick -->
Pax,
Fitz, Tricky,
RickGabriel --> G, Abrie?
Stuart --> ?
Stephen -->
Steen
You can always make a nn out of the combined fn and mn. I have to run or I'd come up with an example. Good luck!