Zita

Zita (c. 1212 – 27 April 1272), also known as Sitha or Citha, is an Italian saint, the patroness saint of maids and domestic servants. She is often appealed to in order to help find lost keys.
Zita commenced her employment in domestic service at the age of 12 and dedicated nearly five decades to serving the same family.

Biography fallback source: Wikipedia