20062006: no US SSA record for this spelling
2007: no US SSA record for this spelling
2008: no US SSA record for this spelling
2009: no US SSA record for this spelling
2010: no US SSA record for this spelling
20112011: no US SSA record for this spelling
2012: no US SSA record for this spelling
2013: 6 births, rank #14,582
2014: 9 births, rank #10,955
2015: 8 births, rank #11,835
20162016: 15 births, rank #7,602
2017: 20 births, rank #6,044
2018: 13 births, rank #8,146
2019: 25 births, rank #5,163
2020: 30 births, rank #4,453
20212021: 32 births, rank #4,326
2022: 29 births, rank #4,671
2023: 52 births, rank #3,140
2024: 45 births, rank #3,459
20252025: 46 births, rank #3,342
In 2025, 46 babies were recorded with the name Lenni, ranking #3,342 among girls.