Pat Nixon

Thelma Catherine Pat Nixon was the wife of Richard Nixon, 37th President of the United States, and First Lady of the United States from 1969 to 1974.

Thelma Catherine Ryan was born in the small mining town of Ely, Nevada, the day before Saint Patricks Day. Her father, William M. Ryan Sr., was a sailor, gold miner, and truck farmer of Irish descent her mother, Katherine Halberstadt, was a German immigrant. Pat was a nickname given to her by her father, referring to her birthdate and Irish ancestry. Upon enrolling in college in 1931 she dropped her first name of Thelma, replacing it with Pat and occasionally rendering it as Patricia the name change, however, was not a legal action, merely one of preference.

Source: Wikipedia