Pope
Old English, via ecclesiastical Latin from ecclesiastical Greek papas ‘bishop, patriarch’, variant of Greek pappas ‘father’.
wiktionary
From Middle English pope, popa, from Old English pāpa, from Vulgar Latin papa(title for priests and bishops, esp. and by 8th c. only the bishop of Rome), from early Byzantine Greek παπᾶς(papâs, title for priests and bishops, especially by 3rd c. the bishop of Alexandria), from late Ancient Greek πάπας(pápas, title for priests and bishops, in the sense of spiritual father), from πάππας(páppas, “ papa, daddy”).
By analogy with bishop(“ mulled and spiced wine”).
From Russian поп(pop), from Old Church Slavonic попъ(popŭ), from Byzantine Greek παπᾶς(papâs) as above.
Of Onomatopoeic origin.
etymonline
pope (n.)
"the Bishop of Rome as head of the Roman Catholic Church," c. 1200, from Old English papa (9c.), from Church Latin papa "bishop, pope" (in classical Latin, "tutor"), from Greek papas "patriarch, bishop," originally "father" (see papa).
Applied to bishops of Asia Minor and taken as a title by the Bishop of Alexandria c. 250. In the Western Church, applied especially to the Bishop of Rome since the time of Leo the Great (440-461), the first great asserter of its privileges, and claimed exclusively by them from 1073 (usually in English with a capital P-). Popemobile, his car, is from 1979. Pope's nose for "fleshy part of the tail of a bird" is by 1895. Papal, papacy, later acquisitions in English, preserve the original vowel.
