Is it mad, or do you think Reggie could work as an everyday shortening of Peregrine? Yes it is a bit of a stretch to pull a soft g from a hard g but there are stranger ones, like Teddy from Edward. Peregrine is quite a lot of name but an old name with some nice associations such as the falcon or the first mayflower pilgrim born in North America. I was going to put it in the middle family name slot but wonder if Reggie offers a more modern and unpretentious alternative to Peregrine as a first name. I dislike Perry as it feels like the wrong generation and I'm also visualising Kathy Burke. I'm not especially a fan of the name Reggie/Reg as a stand alone but I don't dislike it as a playground name. I'm not a fan of Reginald at all however. I quite like the contrast between Peregrine and Reggie, I could be completely wrong in how this comes across though.
I asked a few of my younger but university educated work colleagues what they thought about the name Peregrine and received answers along the lines of: Miss Peregrine's home for peculiar children/Isn't that a girls' name?/Like the bird?/Is that a real name? So I'm not sure it will carry any strong connotations for younger generations other than possibly sounding like a young adult fantasy character. On that note,: Morwenna + Peregrine? I wonder if this seems quite thematic or possibly a teensy bit alternative/glastonbury/pagan revival? Or just two romantic and old fashioned names? I have slightly less grand alternatives such as Ludo/Hector/Rafe/Edmund under consideration as well.