EMILY: Young man, come in here please.
LORELAI: Hey, Dean, meet my mother, Emily Post.
Emily Post (1872-1960) was a famous expert on etiquette. Her 1922 book Etiquette in Society, in Business, in Politics and at Home became an instant best-seller, was popular for decades, and made her name. She went on to write newspaper columns on etiquette, and founded the Emily Post Institute in 1946, which carries on her work.
It’s interesting to wonder if Emily Gilmore is named after her.