N0-1_H3r3 said:
This may be more or less problematic for different chapters - those using Ultramarines or Imperial Fists geneseed (as the most stable, and the most commonly used) would have less difficulty finding someone genetically compatible, while a potential Space Wolves Rune Priest may have to be Fenrisian, as only those native to Fenris are suitable to become Space Wolves (something suggested in more recent background, and which provides quite a fitting explanation for why the Wolf Brothers - the only successor chapter produced from the Space Wolves' geneseed - became unstable).
The Wolf Brothers are the only known and documented founding created from the Space Wolves . As there is likely to still be geneseed in the vaults on Terra, it's possible that there have been further foundings utilizing the Get of Russ as a basis. I've personally liked the idea of working up a successor chapter to the Wolves from the so-called "cursed 13th founding." Just my thoughts, though.
-=Brother Praetus=-