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).
Graham has been climbing in recent years. All-time it's been given to 61,671 U.S. babies, the 280th most common name by sound today, peaking at 2,980 in 2025, with 2,980 in 2025.
Graham has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).