Anthony 'Tolly' Burnett (1923 – 1993) was an English cricketer. Burnett was a right-handed batsman who occasionally fielded as a wicket-keeper. He was born at Chipstead, Surrey, and was educated at Lancing College.
Toseland "Tolly" Oldknow is a main character in the Green Knowe book series by children's author Lucy M. Boston. Tolly can also be used as a nickname for Ptolmey.
Sounds like a hundred-year-old little girl name to me (that is, a name that was used a hundred years ago, and that sounds like it suited little girls back then). It just rhymes with some other ones, that is, Molly, Polly, Dolly, and the most mature one that isn't derived from anything, Holly.
In the series "Children of the Red King" aka "Charlie Bone series" there is a girl named Emma Tolly. Except it says that her surname originates from the city Toledo.