| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 1921 | Fitzadam | English | Son of Adam. | M | |
| 1922 | Fitzgerald | English | Mighty spearholder's son. | M | |
| 1923 | Fitzgibbon | English | Son of Gilbert. | M | |
| 1924 | Fitzgilbert | English | Son of Gilbert. | M | |
| 1925 | Fitzhugh | English | Son of Hugh. | M | |
| 1926 | Fitzjames | English | Son of James. | M | |
| 1927 | Fitzpatrick | English | Son of Patrick. Surname. | M | |
| 1928 | Fitzroy | English | A name meaning 'king's illegitimate son'. | M | |
| 1929 | Fitzsimmons | English | Son of Simon. | M | |
| 1930 | Fitzsimon | English | Son of Simon. | M | |
| 1931 | Fitzsimons | English | Son of Simon. | M | |
| 1932 | Fitzwalter | English | Son of Walter. | M | |
| 1933 | Fitzwater | English | Son of Walter. | M | |
| 1934 | Fleming | English | From the valley. | M | |
| 1935 | Flemming | English | Variant of Fleming: From the valley. | M | |
| 1936 | Fletch | English | Diminutive of Fletcher: Maker of arrows. | M | |
| 1937 | Fletcher | English | Maker of arrows. Often used as a surname, less commonly a given name. Famous bearer: Fletcher Christian was a mutineer on the infamous ship 'Bounty'. | M | |
| 1938 | Flint | English | Stream. Place-name and surname. Flint stone produces a spark of fire when struck by steel. | M | |
| 1939 | Floyd | English | A variant of the Welsh 'Lloyd'. Famous bearer: Heavyweight boxing champion Floyd Patterson. | M | |
| 1940 | Fluellen | English | From the Welsh Llewellyn. Famous bearer: Fluellen was a character in Shakespeare's 'Henry V'. | M | |