The name Thelma experienced considerable popularity and fluctuation throughout the century spanning from 1896 to 1969. The peak of its usage occurred between 1910 and 1924, with a total of 454 births recorded during this period. The year 1918 saw the highest number of newborn girls named Thelma, with a notable 44 births. However, by the late 1930s, its popularity began to decline dramatically, culminating in fewer than 10 births per year from 1945 onwards. Overall, the name Thelma was bestowed upon 1142 baby girls during this time.