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).
Ibrahim has been climbing in recent years. All-time it's been given to 17,907 U.S. babies, the 749th most common name by sound today, peaking at 939 in 2025, with 939 in 2025.
Ibrahim has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).