In America, there was a very famous investment writer named Benjamin Graham, who was Warren Buffett's teacher. But his birth name was actually Benjamin Grossbaum, a German name he changed during World War I.
What would be the term for the other name, Benjamin Grossbaum? Would it be "der ursprüngliche Name" (the original name)?
And how would one refer to the new name, Benjamin Graham?
geborene[r]. Benjamin Graham geb. Grossbaum war ein... (see here)