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.
Sheldon's twin sister, who's happy to stay in fourth grade, has a better sense of what awaits her brother than he does. Young Sheldon may understand Newtonian physics, but his blue-collar, church-going family only cares if that knowledge will help them win a football game.