I've never heard of it either. "The Hampbar is a rare, auto-sexing, dual-purpose chicken breed developed in Canada during the 1950s by crossing Rhodebar males with New Hampshire females. Known as Barred New Hampshires, they are hardy, active foragers, and reliable layers of brown eggs. They are...
Yes, that's a splash chick. Their catalog has a photo of a different splash colored chick as an example. Every chicken breed can be every color, it's their shape/outline and egg color as an adult that defines the breed.
https://www.mthealthy.com/birds/splash-australorp
Or feel free to breed and keep them together without hatching the eggs. Double frizzles make for chickens that look naked and molting all the time, definitely kinder to avoid.