Tag was a bay filly bred by George Wyndham, 3rd Earl of Egremont, and foaled in 1786.
[1] She was sired by Trentham, a successful racehorse who ran for eight years, winning many races, including two Jockey Club Plates.
Tag won the race from Earl Grosvenor's sister to Trifle, with Hope finishing in third place, the filly by Magnet in fourth and Restless in fifth.
[4] In June at Ascot Heath, she lost a mile and a quarter match race against the colt Magpie.
[6] As a broodmare for the Earl of Egremont she produced eleven foals, including Tag, Gulliver, Lazy, Baby and Old Maid.