1793, agent noun from toddle. Toddlekins is from 1839.
Entries linking to toddler
toddle v.
"to run or walk with short, unsteady steps," c. 1600, Scottish and northern British, of uncertain origin, possibly related to totter (1530s); an earlier sense of "to toy, play" is found c. 1500. Related: Toddled; toddling.