Green’s Dictionary of Slang

anthony n.

also tantony, tantany
[SE St Anthony’s pig; St Anthony is the patron of swine-herds, and is always represented as accompanied by a pig; and Berkshire dial. tanthony, the smallest pig in a litter]

the runt of the litter; the favourite or smallest pig in the litter.

[UK]MS Hunterian in Middle Eng. Dict. Pigge [...] Renners aboute fro house to hous as antonie pigges & fro towne to towne..seme þat þei kunne hele of alle maner sekenesse of þe yȝen.
Chronicles Eng. (Caxton) ccxliv: And there come to hem an Anthony pigge and folowed the hoost alle that way till they come to a grete water.
[UK]J. Heywood A Merry Play in Farmer (1905) 67: But she will go gadding very much / Like an Antony pig with an old witch.
[UK]J. Gauden Tears, Sighs, etc. of the Church of England Bk IV 595: Yea some are such Cossets and Tantanies, that they congratulate their Oppressors, and flatter their Destroyers.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[US]‘Jack Downing’ Andrew Jackson 39: [They would] follow arter him jist like a tantoney pig or whipt spaniel.
[UK]Swell’s Night Guide 109/2: Anthony, or Tantony Pig, the favourite or small pig, of a litter; to follow like a tantony pig, that is, St. Anthony’s pig to follow at the heels.
[UK]Standard 24 May 3/5: ‘What is an Anthony?’ ‘The littlest pig, your honour. The little pig is always “Anthony”’ .
[UK]Derbyshire Times 26 July 5/2: Anthony Pig. The ruckling of the litter.