Which version is better?with its source form and related girl names. Prominent related forms of Sib (NOT IN TOP 2000) are Sibyl and Sybil. Other forms, like Sybel, are uncommon. These forms of Sib were favored during 1910-1919 (ADOPTION OF 0.04%), but now, versions such as Sibyl have become less trendy. (TOP BABY NAMES, 2015)
Similar NamesSuggested similar names are Lib and Sis. Like Sib, these names are not frequently used.See names in meaning and etymology.