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).
Kendrick
Kendrick is now well below its former popularity. All-time it's been given to 33,942 U.S. babies, the 915th most common name by sound today, peaking at 1,054 in 2013, with 564 in 2025.
Kendrick has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).