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).
Hamza
Hamza climbed for decades and has been a steadily popular name ever since. All-time it's been given to 10,573 U.S. babies, the 1,015th most common name by sound today, peaking at 565 in 2024, with 556 in 2025.
Hamza has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).