Meaning unknown. It was a rare name when British author Marie Corelli used it for the Norwegian heroine of her novel Thelma (1887). The name became popular around the end of the 19th century after the novel was published. It is sometimes claimed to derive from Greek θέλημα (thelema) meaning "will", though this seems unlikely.
We use a combination of data from the internet, and our own Machine Learning models to make these predictions.
In a gist, we use a Machine Learning model trained on a diverse global dataset of 100m+ names, and use it to predict different traits for a person based on first name!
NameGuessr guesses a person's nationality, age, and gender based on their name. We also try to give insightful info around the name's origin, name meaning, and name pronounciation.