patronyoudaoicibaDictYouDict[patron 词源字典]
patron: [14] Patron is one of a large group of English words descended from pater, the Latin member of the Indo-European family of ‘father’- words (which also includes English father). Among the others are paternal [17], paternity [15], paternoster [OE] (literally ‘our father’), patrician [15], and patrimony [14]. Patron itself comes from Latin patrōnus, a derivative of pater which was used for ‘one who protects the interests of another, as a father does’.

By postclassical times it had acquired its current meanings, including that of a ‘guardian saint’. Pattern is ultimately the same word as patron. The Greek branch of the ‘father’-family is represented by patér, from which English gets patriarch [12], patriot [16] (based ultimately on the notion of a ‘fatherland’), and patronymic [17].
=> father, paternal, pattern, patrician, patriot[patron etymology, patron origin, 英语词源]
patron (n.)youdaoicibaDictYouDict
"a lord-master, a protector," c. 1300, from Old French patron "patron, protector, patron saint" (12c.) and directly from Medieval Latin patronus "patron saint, bestower of a benefice, lord, master, model, pattern," from Latin patronus "defender, protector, former master (of a freed slave); advocate," from pater (genitive patris) "father" (see father (n.)). Meaning "one who advances the cause" (of an artist, institution, etc.), usually by the person's wealth and power, is attested from late 14c.; "commonly a wretch who supports with insolence, and is paid with flattery" [Johnson]. Commercial sense of "regular customer" first recorded c. 1600. Patron saint (1717) originally was simply patron (late 14c.).