Over the past 110 years, 14 boys and 80 514 girls have been named Jillian. The name Jillian ranks 9806th in the United States among the most common names for boys. For the first time more than ten times newborns were named Jillian in 1984. The peak of popularity of the name Jillian came in the 1980s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.