The baby name Lillyan appears in baby name data for the United States from 1919 to 2018. It was most popular in 2009 with 166 babies given the name.
In the later years of this period, Lillyan has become more popular compared with earlier years.
| Year | Count |
|---|---|
| 1919 | 6 |
| 1921 | 6 |
| 2002 | 6 |
| 2003 | 37 |
| 2004 | 50 |
| 2005 | 66 |
| 2006 | 130 |
| 2007 | 91 |
| 2008 | 89 |
| 2009 | 166 |
| 2010 | 156 |
| 2011 | 122 |
| 2012 | 125 |
| 2013 | 75 |
| 2014 | 41 |
| 2015 | 44 |
| 2017 | 34 |
| 2018 | 5 |