Over the past 110 years, 80 514 girls and 14 boys have been named Jillian. The name Jillian ranks 393th in the United States among the most common names for girls. For the first time more than ten times newborns were named Jillian in 1961. The peak of popularity of the name Jillian came in the 1980s and 2000s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.