ampersand: [19] This word for the printed character & is a conflation of the phrase and per se and, literally ‘and by it self and’. This has been variously explained as either ‘the single character “&” signifies and’, or ‘and on its own [that is, as the final character in a list of the letters of the alphabet given in old grammar books and primers], &’. The character & itself is a conventionalized printed version of an abbreviation used in manuscripts for Latin et ‘and’. => and[ampersand etymology, ampersand origin, 英语词源]