This individual has no known canonical name.  While the information presented is canonical, the individual described lacks an official name, thus the title is conjecture.

Meredith Rodney McKay's aunt was the aunt of Dr. Meredith Rodney McKay and Jean Miller. McKay felt she resembled Margaret Thatcher, saying she had the "same hair style, facial structure, only my aunt was much taller and remarkably hirsute. Oddest thing—she had to shave twice a day." (SGA: "Condemned")