The Social Security Administration tracks the most popular names every year. The collection of data has led to a list of the most popular names of the 21st century. Here are the top 5 names for girls and boys. Top 5 girls: (5) Sophia, (4) Isabella (3) Emily (2) Olivia (1) Emma Top 5 boys: (5) Mathew (4) William (3) Ethan (2) Michael (1) Jacob What is your favorite name for a girl or a boy? What process did you use in picking your kid(s) name(s)?