| Father of Seth | 14 |
| Father of science fiction, to many | 34 |
| Father of Science Fiction | 25 |
| Father of sci-fi | 16 |
| Father of scholasticism | 23 |
| Father of Sam and Charlie | 25 |
| Father of Sacha | 15 |
| Father of Romulus and Remus | 27 |
| Father of Romulus | 17 |
| Father of Rhodesian independence | 32 |
| Father of Rhesus | 16 |
| Father of Remus and Romulus | 27 |
| Father of Regan | 15 |
| Father of Ramses II | 19 |
| Father of Rachel and Leah | 25 |
| Father of Rachel | 16 |
| Father of R. E. Lee | 19 |
| Father of Pugsley and Wednesday | 31 |
| Father of psychoanalysis | 24 |
| Father of Proetus | 17 |
| Father of Priam | 15 |
| Father of pop singer Hoku | 25 |
| Father of Pom, Flora, Alexander and Isabelle | 44 |
| Father of Pocahontas | 20 |
| Father of Phobos and Deimos | 27 |
| Father of Phobos | 16 |
| Father of Phinehas | 18 |
| Father of Phineas | 17 |
| Father of Peter and Jane | 24 |
| Father of Pebbles | 17 |
| Father of Paris | 15 |
| Father of Osiris: Var. | 22 |
| FATHER OF ONE-EYED SONS | 23 |
| FATHER of one of David's mighty men | 39 |
| Father of Oedipus | 17 |
| Father of Odysseus | 18 |
| Father of octuplets, on TV | 26 |
| Father of octuplets on "The Simpsons" | 47 |
| Father of Nuclear Physics | 25 |
| Father of Nora and Peer | 23 |
| Father of Mr. Spock | 19 |
| Father of Moses and Aaron | 25 |
| Father of Moses | 15 |
| Father of Moises | 16 |
| Father of modern surgery | 24 |
| Father of modern sci-fi | 23 |
| Father of modern rocketry | 25 |
| Father of modern Italian, per linguists | 39 |
| Father of modern drama | 22 |
| Father of Modern China | 22 |
| Father of Modern Astronomy | 26 |
| Father of modern antiseptic surgery | 35 |
| Father of Minos | 15 |
| Father of Methuselah | 20 |
| Father of Meriones | 18 |
| Father of Menelaus | 18 |
| Father of Medicine | 18 |
| Father of Mark | 14 |
| Father of mankind | 17 |
| Father of Magnus the Good | 25 |
| Father of macroeconomics | 24 |
| Father of logarithms | 20 |
| Father of Lies | 14 |
| Father of Leif | 14 |
| Father of Leah and Rachel | 25 |
| Father of Lavinia in a 16th-century play | 40 |
| Father of Latin poetry | 22 |
| Father of la casa | 17 |
| Father of Kodak | 15 |
| Father of King Hadad: Gen. 36:35 | 32 |
| Father of Kenan | 15 |
| Father of Jupiter | 17 |
| Father of Judaism | 17 |
| Father of Jeff and Beau | 23 |
| Father of Japheth | 17 |
| Father of Jane and Peter | 24 |
| Father of Jacob and Esau | 24 |
| Father of Jacob | 15 |
| Father of Ishmael | 17 |
| Father of Isaac: Abbr. | 22 |
| Father of Isaac | 15 |
| Father of Indira Gandhi | 23 |
| Father of independent India | 27 |
| Father of II | 12 |
| Father of Icarus | 16 |
| Father of Horus | 15 |
| Father of Hophni and Phinehas, in the Bible | 43 |
| Father of His Country's father | 34 |
| Father of Hippolyte | 19 |
| Father of Hippolyta | 19 |
| Father of Hephaestus | 20 |
| Father of Henry II | 18 |
| Father of Hel | 13 |
| Father of Hector and Paris | 26 |
| Father of Hector and Cassandra | 30 |
| Father of Hector | 16 |
| Father of Harold Jr. | 20 |
| Father of Harmonia, in myth | 27 |
| Father of Harmonia | 18 |
| Father of Hannibal | 18 |