Over the past 110 years, 71 boys and 380 107 girls have been named Lillian. The name Lillian ranks 6398th in the United States among the most common names for boys. For the first time more than ten times newborns were named Lillian in 1914. The peak of popularity of the name Lillian came in the 1910s and 1920s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.