The Ta on the Ta-152 was actually for the person who designed the aircraft it was just built by Focke-Wulf that is why it is the Focke-Wulf Ta-152. I would have to research the name of the guy who designed it to tell you who it is but that is what it means. It is just like with the Gotha Ho-229 it was built by Gotha but was designed by Horton, so it got the an Ho-229 designation but some people still mistake it and call it a Gotha Go-299.