Stephen was ranked 246th among male names in the United States in 2015, and 357th in England and Wales (source); Steven was ranked 154th in the United States and 403rd in England and Wales (source). Stephen, however, is the form more often used in historical contexts, and almost exclusively the form used for the saint.
Table: The Top 100 Names: 1900Archived 2011-01-01 at the Wayback Machine, in Popular Forenames in Scotland, 1900 – 2000, General Register Office, Scotland, Occasional Paper No. 2, 2001.
Table: The Top 100 Names: 1950Archived 2009-06-12 at the Wayback Machine, in Popular Forenames in Scotland, 1900 – 2000, General Register Office, Scotland, Occasional Paper No. 2, 2001.
Table: The Top 100 Names: 1900Archived 2011-01-01 at the Wayback Machine, in Popular Forenames in Scotland, 1900 – 2000, General Register Office, Scotland, Occasional Paper No. 2, 2001.
Table: The Top 100 Names: 1950Archived 2009-06-12 at the Wayback Machine, in Popular Forenames in Scotland, 1900 – 2000, General Register Office, Scotland, Occasional Paper No. 2, 2001.