T.J. is for Thomas Jefferson. I admire the man and his ideals of liberty. I especially admire him because he recognized that the true Gospel of Jesus Christ was not on the earth but that it would be, albeit too late for him as he presumed. That gospel was restored a mere four years after his death.
In the center of the pen name is J.C.; which is for Jesus Christ whom I hope will be the center of my life. Much has been written and prophesied of Him in much more eloquent terms than I could hope to pronounce, so I will leave it at I know He is my Savior.
Lastly, Locke is for John Locke whose Two Treatise influenced my thinking regarding government.