How to read the band →
Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Lennox
Lennox has been climbing in recent years. All-time it's been given to 19,739 U.S. babies, the 433rd most common name by sound today, peaking at 1,915 in 2022, with 1,552 in 2025.
Lennox has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).