Alan Shepard
Developers wanted to at least give Shepard a last name so that other characters could address them. The developers wanted a name that was both "all-American" and common, which led them to start looking at the original seven astronauts. Alan Shepard was chosen due to fitting with the idea of "their" Shepard, being tough and respected, and fitting in with the character being the first human Spectre – Alan Shepard being the first American in space.