| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 21 | Han | Czechoslovakian | Variant of John. | M | |
| 22 | Hlinka | Czechoslovakian | Burns lime. | M | |
| 23 | Hnedy | Czechoslovakian | Brown. | M | |
| 24 | Holic | Czechoslovakian | Barber. | M | |
| 25 | Honza | Czechoslovakian | Gift from God. | M | |
| 26 | Hrusosky | Czechoslovakian | Dwells near the pear tree. | M | |
| 27 | Hudak | Czechoslovakian | Blond. | M | |
| 28 | Janalyn | Czechoslovakian | Variant of John. In Roman mythology; Jana was the wife of Janus. | M | |
| 29 | Janek | Czechoslovakian | Variant of John God has been gracious; has shown favor. | M | |
| 30 | Janny | Czechoslovakian | Variant of John. In Roman mythology; Jana was the wife of Janus. | M | |
| 31 | Janos | Czechoslovakian | Variant of the Hebrew John: Jehovah has been gracious; has shown favor. | M | |
| 32 | Jirka | Czechoslovakian | Farmer. | M | |
| 33 | Josef | Czechoslovakian | May God give increase. | M | |
| 34 | Jozka | Czechoslovakian | God will multipIy. | M | |
| 35 | Kafka | Czechoslovakian | Bird. | M | |
| 36 | Kopecky | Czechoslovakian | Hill. | M | |
| 37 | Kovar | Czechoslovakian | Smith. | M | |
| 38 | Kozel | Czechoslovakian | Goat. | M | |
| 39 | Kral | Czechoslovakian | King. | M | |
| 40 | Kramoris | Czechoslovakian | Merchant. | M | |