Thank you! I'm not sure what to call the color. It reminds me of how pied looks in some birds and animals so I've been calling him him pied-like for now.
The others that are somewhat similar I've found pictures of are more on a black base or a more buff-red base so more black/white and red/white. Based on his offspring I think Pants is probably partridge based (eb). He also seems to be singly barred though you can't tell visually. He's had a fair number of barred offspring with non barred partners. If I'm lucky hopefully I'll be able to breed for the patchy-pied like white on multiple colors. The girls he has right now are a variety of colors so that should help.
They aren't very good pictures but here are the girls. I'll probably pick some of my nicest typed girls later on to pair with him too but for now I'm trying to be careful with biosecurity and will keep him and his girls separate from the main flock for the first couple months. I'd like trying to pair him with one of my mille split satin girls as well sometime. That might help answer a little sooner if his white is due to mottling of some sort.
View attachment 3252325
View attachment 3252326
View attachment 3252327
Pictures sound lovely!