Recorded in over forty spelling forms from Lambert, Lambard and Limprecht, to Lambrich, Lambertini and Lemmens, this surname is almost certainly of very early German origins. As a surname it started life in the 12th century, but the derivation is from a pre 5th century personal name.
Sheldon was raised in Galveston, Texas along with his elder brother and fraternal twin sister (Missy) by his mother, Mary Cooper, an overtly devout Evangelical Christian; and George Cooper, an alcoholic who was never around.
Penny Hofstadter (nÃ©e Unknown) is the series' first and always main female protagonist. She lives in Apartment 4A with her husband Leonard Hofstadter across the hall from Sheldon Cooper, and Amy Farrah Fowler, who live in apartment 4B where Penny used to live.