Meaning and Name Origin
Sydney \s(y)-dney, syd-ney\ as a girls' name (also used less commonly as boys' name Sydney) is pronounced SIHD-nee. It is of Old English origin, and the meaning of Sydney is "wide island". Also possibly place name: Saint Denis. Sidney is favored as a name for boys, and Sydney is almost entirely used for girls, probably due to influence in the 1980s from madam/celebrity Sydney Biddle Barrows.
Sydney is a very prominent first name for women (#1011 out of 4276, Top 24%) and a slightly less prominent surname for both adults and children (#45206 out of 88799, Top 51%). (2000 U.S. Census)
Displayed below is the baby name popularity of Sydney for girls. Sydney entered the list in 1930-1939 and reached its highest position of #23 in the U.S. in 2002, and is at #109 currently. (Top 1000 Baby Names Statistics, 2014)
Displayed below is an analysis of the popularity of the girl name Sydney and related names. Cydney, Sidney (#915 in 2014), Sydnee, Sydni and Sydnie are the prominent alternative forms of Sydney (#109 in 2014). These girl names reached the top of their popularity in 2000 and have become significantly less popular since, with the versions Sidney, Sydnee, Sydni and Sydnie becoming less stylish. Sydney (#109) is the most chic name for newborns among these, with this name undergoing a rebound in popularity. (Top 1000 Baby Names Statistics, 2014)