The Spanish word 'patrona' comes from the Latin word 'patrona', meaning 'female protector'. This Latin word was the feminine form of 'patronus' meaning 'protector, defender', which itself derived from the Latin word 'pater' meaning 'father'. The evolution from 'father' to 'protector' reflects how fathers were traditionally seen as protectors and defenders of the family. In modern Spanish, 'patrona' has evolved to mean 'female patron' or 'landlady', maintaining the sense of authority and protection but in a more specific social or business context.

Some related Spanish words include 'patrón' (male patron or boss), 'paternal' (fatherly), and 'padre' (father). All these words share the same Latin root 'pater' and maintain connections to concepts of authority, protection, and guardianship.

English speakers might recognize the connection to several familiar words: 'patron' (a supporter or customer), 'patronize' (to support or frequent as a customer), and 'paternal' (relating to father). The most famous related word might be 'patronus' from the Harry Potter series, which refers to a protective spiritual guardian - directly borrowing the Latin word that also gave us 'patrona'. All these words trace back to the same Latin root meaning 'father' and share themes of protection and support.