Eponyms: I – J
~~~~~ I ~~~~~
| Iris | Iris, Greek goddess of the rainbow |
~~~~~ J ~~~~~
| jackanapes | Jack Napes, nickname of William de la Pole, Duke of Suffolk (d. 1450), English nobleman |
| Jack Russell terrier | John (Jack) Russell (1795-1883), English clergyman |
| Jacquard loom | Joseph Marie Jacquard (1752-1834), French weaver and inventor |
| Jacuzzi | Candido Jacuzzi (1903-86), Italian/US inventor and businessman |
| jansky | Karl C. Jansky (1905-50), Czech-born American radio engineer |
| January | Janus, Roman god of doors, thresholds and bridges |
| JCB | Initials of Joseph Cyril Bamford (b.1916), English manufacturer |
| Jekyll and Hyde | Main character in novel The Strange Case of Dr Jekyll and Mr Hyde (1886) by Scottish writer Robert Louis Stevenson (1850-94) |
| jeremiad | Jeremiah, Old Testament prophet |
| jeroboam | Jeroboam, first king of the northern kingdom of Israel |
| jerry can | Jerry, the word for a German or German soldier |
| Jezebel | Jezebel, biblical figure, daughter of Ethbaal, king of Tyre and Sidon |
| Jonah | Jonah, Hebrew prophet |
| jorum | Joram, character in Old Testament (II Samuel 8:10) |
| joule | James Prescott Joule (1818-89), English physicist |
| jovial | Jove, an older name for Jupiter, supreme god of Roman mythology |
| Judas | Judas Iscariot, Christ’s betrayer |
| juggernaut | Jagannath, Lord of the World, title of Hindu god Vishnu |
| Julian calendar | Julius Caesar, 44BC Roman emperor |
| July | As entry for Julian calendar |
| jumbo | Jumbo, 62 ton African elephant exhibited at London Zoo from 1865 to 1882 |
| June; Junoesque | Juno, Roman goddess of the moon, women and marriage |