It's a first generation Hope Technology hub made in the 1990's when it was common amongst many manufacturers to make hubs out of three pieces and glue them together. The Fatso is a mountain bike hub, the theory being that a fat hub would stiffen up the early design suspension forks. There is no matching rear ie. there is no Fatso rear, instead it was used with Hope's generic rear called the Ti-Glide. I doubt you'd find a Ti-Glide, Hope are well into their 3rd generation hubs now.
Given the choice I wouldn't use it, you'd be much better off with a modern hub. Perhaps a collector may pay a premium in a few years.