Thomasene is of French origin, derived from the name Thomasine, which itself is a feminine form of the male given name Thomas. It is a rare name that was most popular during the mid-20th century but has since fallen into obscurity. The name Thomasene has no known meaning or etymology associated with it beyond its connection to Thomas and other names derived from it.
"Thomasene experienced fluctuating popularity over the years, with peak birth years being 1942 (15 births), 1954 (14 births), and 1964 (6 births). The name's usage was generally consistent throughout most decades, ranging between 5 to 10 births per year. However, there were notable drops in popularity during the late 1930s to early 1940s, with fewer than 6 births recorded each year from 1938 to 1942."