So I wanted to start a game as Hæsteinn of Nantes. I planned to go native after a few generations and change his family's culture to Breton, but I feel like the name "Hæsteining" would be a little bit out of place for a dynasty of Breton kings. My plan was to change his family name after going native to something like "de Hæsteinn", but this still doesn't feel right. My question is: How do you think his name would be written if I used the French writing system? I was thinking of something like "de Hasten", "de Haesten" or "de Hestein", but that's still not quite there. Thoughts?