| Name | # Entries |
|---|---|
| Jappie | 53 |
| Jason | 52 |
| Johansson | 51 |
| Jeftha | 51 |
| Joll | 49 |
| Josephs | 48 |
| Joshi | 48 |
| Janes | 47 |
| Jadwat | 45 |
| Jada | 45 |
| Jamal | 44 |
| Jose | 43 |
| Job | 43 |
| Judson | 43 |
| Jaques | 42 |
| Jamison | 42 |
| Justice | 41 |
| Joosab | 40 |
| Jopson | 40 |
| Julie | 39 |
| Jeans | 38 |
| Jesus | 37 |
| Jacobus | 35 |
| Janse | 34 |
| Jarden | 34 |
| Jenny | 34 |
| Johnsen | 34 |
| Jenkinson | 33 |
| Jepson | 33 |
| Jull | 32 |
| Jasson | 32 |
| Jeffrey | 32 |
| Jowett | 32 |
| Jairam | 31 |
| Jeong | 31 |
| Jegels | 31 |
| Jehovah's | 31 |
| Jacks | 31 |
| Jaffe | 30 |
| Jelley | 30 |
| Jan | 30 |
| Jade | 30 |
| Jeffares | 30 |
| Jassat | 30 |
| Josias | 29 |
| Jaganath | 29 |
| Jim | 28 |
| Jamie | 28 |
| Jagers | 28 |
| Jukes | 27 |
| Jacoby | 27 |
| Jele | 27 |
| Jonge | 27 |
| Jeff | 26 |
| Japanese | 26 |
| Jiyane | 26 |
| Jogee | 26 |
| Jenks | 26 |
| Jim's | 26 |
| Jago | 26 |
| Jooma | 26 |
| Jeram | 25 |
| Jacqui | 25 |
| Jobson | 24 |
| Japhta | 24 |
| Jeffcoat | 24 |
| Joynt | 24 |
| Jacobsen | 23 |
| Jolliffe | 23 |
| Jervis | 22 |
| Julyan | 22 |
| Joannou | 22 |
| Judkins | 22 |
| Jorgensen | 21 |
| Janson | 21 |