| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 381 | Ives | Teutonic | Archer. | M | |
| 382 | Ivo | Teutonic | Archer's bow. | M | |
| 383 | Ivon | Teutonic | Archer's bow. | M | |
| 384 | Ivor | Teutonic | Archer's bow. | M | |
| 385 | Jarold | Teutonic | Strong with a spear. | M | |
| 386 | Jarvis | Teutonic | Sharp as a spear. | M | |
| 387 | Jeffrey | Teutonic | God's peace. | M | |
| 388 | Jenris | Teutonic | Sharp as a spear. | M | |
| 389 | Jerrold | Teutonic | Strong with a spear. | M | |
| 390 | Kelby | Teutonic | From the farm by the spring. | M | |
| 391 | Kelcey | Teutonic | Dwells by the water. | M | |
| 392 | Kelsey | Teutonic | Dwells by the water. | M | |
| 393 | Kerbasy | Teutonic | Warrior. | M | |
| 394 | Kerhasi | Teutonic | Warrior. | M | |
| 395 | Kerhy | Teutonic | From the church village. | M | |
| 396 | Kilby | Teutonic | From the farm by the spring. | M | |
| 397 | Kirby | Teutonic | From the church village. | M | |
| 398 | Kirk | Teutonic | Dwells near the church. | M | |
| 399 | Koldobika | Teutonic | Famous in war. | M | |
| 400 | Konrad | Teutonic | Strong advisor. | M | |