If you look at their myspace page you'll see the list of styles and the names of some of the people they trace their lineage to.
http://www.myspace.com/lohanschool
This is also the myspace page of the school's Sifu Steven Baugh with pictures of him with some of his teachers.
http://www.myspace.com/sifudashi
Why are they called Lohan? Don't know, you'll have to ask them.