Baby Names Gender-Neutral Names Meaning of the Name Sibley Updated January 18, 2026 by Jennifer M. Sibley Gender: Neutral Origin: English Meaning: Brother Or Sister ♥ Add to my Namelist What is the meaning of the name Sibley? The name Sibley is primarily a gender-neutral name of English origin that means Brother Or Sister. People who like the name Sibley also like: Lawson, Alden, Aidan, Hudson, Oliver, Brighton, Archer, Amelia, Blythe, Adeline, Tenley, Tatum, Olivia, Paige Names like Sibley: Sophilia, Sophelia, Sybil, Seville, Sevilla, Spallu, Sabelle, Sibila, Sibyl, Saiful, Sable, Sabella, Saviolla, Sebille, Saifullah Stats for the Name Sibley Sibley is currently not in the top 100 on the Baby Names Popularity Charts Sibley is currently not ranked in U.S. births