Real or imagined?
There's Iron Hands (Ferrus Manus) who has iron hands that leads the Iron Hands from his flagship The First of Iron. Also all of the Iron Hands replace their hands with iron hands to honour Iron Hands' iron hands
There's also Leman Russ, also known as Wolf King or Great Wolf, who leads the Space Wolves (some of whom ride wolves). He was raised by wolves on the planet Wolf (Fenris). His fortress is called the fang, and sometimes Space Wolves mutate into wolf-like beings called wulfen.
Guilliman and the Ultramarines are funny in a different way, they aren't named after the colour ultramarine (though they are painted ultramarine) or their status as "ultra" marines (as in they follow the standard set in the Codex Astartes) but instead it's because they hail from Ultramar, hence they're ultramar-ines.