Okay, I think we all thought you were talking about a beach cat. This looks like an old design, but I would say "Galaxia" is definitely the name of the boat. A brand or manufacturer name would not be so prominent and would not be in an area where the owner might normally want to put the boat's name.

If you contact Multihulls Magazine, which specializes in big multihulls, they might recognize the design; but I would guess it is not a production boat. MM's e-mail address is multimag@aol.com -- send them the picture. And let us know what you find out.