Surname Location Reference Project - I and J
| Surname | Slovakia Location | County | Submitter | State or Province | Reference Number |
|---|---|---|---|---|---|
| IGNATKO | Krompachy | Spis | Thomas | OH | SP-020 |
| IGNATZ | Kosice | Abov | Hornack | OH | 0997B |
| IGNOCAK / SMOLKA | Oscadnica | Trencin | Chapko | WI | 1417A |
| ILAVSKY | Vazec | Liptov | SC | 1676 | |
| ILIAS | Diviaky nad Nitricou | Nitra | Illias | OR | 0188 |
| ILKO | Brezina | Zemplin | Drangula | NJ | 1535A |
| ILLY-ELLAK | Vysoka pri Morave | Bratislava | IL | 1718A | |
| IMRICH | Hutka | Saris | Emerick | PA | SA-094 |
| IMRICH | Kosice | Abov | Emerick | PA | 0815 |
| INAS | Lubotice | Saris | Namespetra | ONT | SA-159B |
| ISKRA | Krasna Horka | Orava | Bokmiller | OH | 0876 |
| ISKRA | Krasna Horka | Orava | Novak | OH | 1192 |
| ISKRA | Krasna Horka | Orava | Novak | OH | 1378A |
| ISTOK | Sintava | Nitra | Chmelar | MI | NI-046 |
| IVAN | Drienov | Saris | Besserman | IL | 1458B |
| IVAN | Rakovec nad Ondavou | Zemplin | Solomon | PA | 0192 |
| IVAN | Stretavka | Uz | Petti | NJ | 0518A |
| IVANCAK | Hermanovce nad Toplou | Saris | Ivancak | OH | 0932 |
| IVANCHAK | Zdiar | Spis | Evanstock | AZ | 0507 |
| IVANCIK | Blatne | Bratislava | Sharrock | MD | 0046 |
| IVANCK / SLADICK | Nizne Lapse | Spis | Soltis | NY | 1283A |
| IVANEC | Polomka | Gemer | Ivanec | OH | 0979 |
| IZO | Madocany | Liptov | Sallack | MI | 1607A |
| JABLUNOVSKY | Polanovce | Spis | Jablunovsky | PA | 0697 |
| JACIK | Stretave | Uz | Ramson | MD | UZ-004 |
| JACISIN | Bertotovce | Saris | Yancisin | PA | 0682 |
| JACKO | Vranov nad Toplou | Zemplin | Opsatnik | NV | 0595 |
| JAGERCIK | Polomka | Gemer | Yagercik, Jr | .PA | 0392 |
| JAHELKA | Hlohovec | Nitra | Ward | IL | 1251B |
| JAKAB | Krakovany | Nitra | Hornack | OH | 0998 |
| JAKAB | Trstene pri Hornade | Abov | Goodrich | OH | 1381 |
| JAKUB | Jakubany | Spis | Regrut | OH | 1137A |
| JAKUB | Michalovce | Zemplin | Jacob | NJ | 1233 |
| JAKUBAC | Petrova Ves | Nitra | Jakubac, Sr | .PA | NI-037 |
| JAKUBCO | Fintice | Saris | Roselle MSC | PA | SA-111 |
| JAKUBEC | Brodske | Nitra | Burskey | OH | 0064A |
| JAKUBIK | Poproc | Abov | Kasmann | MO | 1518C |
| JAKUBIK | Sokol | Saris | Kasmann | MO | 1518B |
| JAKUBJAK | Lutina | Saris | Jakubiak | OH | 1208 |
| JAKUBJAK | Spis | Nordstrom | CA | 1386 | |
| JAKUBKO | Vechec | Zemplin | OH | ZE-022 | |
| JAMBOR | Povazany | Nitra | Yambor | IL | 0039 |
| JANCI | Lysa nad Dunajcom | Spis | Peters | PA | 0759 |
| JANCIK | Jakubany | Spis | OH | 1714B | |
| JANCOSEK | Smilno | Saris | Jancosek | CO | SA-133 |
| JANDIK | Trencin | Trencin | Vondriska | OH | 0680B |
| JANDURA | Habovka | Orava | Jandura | NY | 0254 |
| JANDURA | Spisska Nova Ves | Spis | Jandura | NY | SP-060A |
| JANECEK | Pruske | Trencin | Mihalek, Sr | .WI | 1016 |
| JANICKO | Lipany | Saris | Lenns | PA | SA-008 |
| JANIGA | Raznany | Saris | Budinsky | PA | 0124 |
| JANIGLOS | Vikartovce | Spis | Yaniglos | OH | 1138 |
| JANIK | Dlha nad Oravou | Orava | Migay | ONT | 0244 |
| JANIK | Majcickov | Bratislava | Gibson | GA | BP-048 |
| JANIK | Pruske | Trencin | Janik | WI | TR-014 |
| JANIK | Unin | Nitra | Yanik | PA | 0466 |
| JANIK | Zabiedovo | Orava | Galvon | ALB | 0447 |
| JANIS | Nitra | Nitra | Janis | OH | NI-068 |
| JANIS | Zubak | Trencin | Fajer | OR | TR-001 |
| JANKECH | Krakovany | Nitra | Sidman | FL | NI-003A |
| JANKO | Bela nad Cirochou | Zemplin | Janko | OH | 0072 |
| JANKURA | Torysky | Spis | Sofranko | PA | 0646 |
| JANLOVSAK | Stare | Zemplin | Budzinsky | IL | 1529 |
| JANOS | Jablonove | Bratislava | Patten | NJ | BP-022 |
| JANOS | Marianka | Bratislava | Fleming | WI | BP-024 |
| JANOSCIK | Dargov | Zemplin | Rebuck | MD | 0821 |
| JANOSIK | Sokol | Saris | Janosik | WI | 0006 |
| JANOSKA / BIELIK | Orlove | Trencin | Langa | TN | 0234 |
| JANOSKO | Rajecka Lesna | Trencin | Hamre | OH | TR-004 |
| JANOSKO | Sarisske Dravce | Saris | Yanosky | VA | SA-216 |
| JANOVIAK | Velka Lipnica | Orava | Omilak | PA | 0896A |
| JANOVIC | Ruzomberok | Liptov | Mihalek, Sr | .WI | 1049 |
| JANOVSZKY | Nova Bana | Tekov | Lewis | MD | 1553 |
| JAROS | Nizny Hrusov | Zemplin | IL | ZE-023 | |
| JAROS | Spissky Stiavnik | Spis | Rudy | OH | 0594 |
| JASANY | Kosice | Abov | Mondak | OH | 0978A |
| JASECHKO | Teplicka | Spis | Javorsky | OH | 1375B |
| JASECKO | Teplicka | Spis | Yasechko | OH | 0406 |
| JASEK | Klubina | Trencin | Savage | OH | TR-011 |
| JASICKA | Lipnice | Orava | Luther | PA | 0016A |
| JAVORSKY | Spisska Nova Ves | Spis | Celec | VA | SP-066 |
| JAVORSKY | Spissky Stiavnik | Spis | Javorsky | OH | 1375 |
| JEDRISAK | Oscadnica | Trencin | Jedrisak | OH | 0511 |
| JENCA | Ovcie | Saris | Vargo | PA | SA-168A |
| JENDRUCH | Hrisovce | Spis | Zehala | OH | 0365A |
| JERDONEK | Spisska Bela | Spis | Samson | MI | SP-063 |
| JERNDONEK | Spisska Bela | Spis | Sabol | PA | SP-043B |
| JEZIERCZAK | Cierna Hora | Spis | MD | 1693 | |
| JEZSOVICS / YEZOVIT | Kosolna | Bratislava | Roskos | MD | BP-020 |
| JOHANNIK | Bolesov | Trencin | Mihalek, Sr | .WI | 1017 |
| JUN | Klenov | Saris | Krehely | MD | 0451A |
| JUPIN / DZUPIN | Vysny Orlik | Saris | Barr | NJ | SA-223A |
| JURA | Malcov | Saris | Kopera | PA | 1302C |
| JURACKO | Nitra | Juracko | MI | 1377 | |
| JURAS | Ziar | Liptov | Schwarz | NJ | 1577A |
| JURCENKO | Dacov | Saris | Jurcenko | IL | 1124 |
| JUREC / JURES | Hanusovce nad Toplou | Saris | Ftacek | IL | SA-067A |
| JURECNA | Rovne | Saris | Valasek | IL | SA-166B |
| JUREK | Liptov | Halko | NY | 0606 | |
| JURICEK | Bardejov | Saris | Juricek | OH | 1189 |
| JURIGA | Gbely | Nitra | Reynolds | NH | 1427 |
| JURIGA | Pribis | Orava | Creagan | MI | 1162 |
| JURINKO / HARABURDA | Bacuch | Zvolen | Jurinko | PA | 0884 |
| JURKANIN | Kozany | Saris | Neumann | IL | 0871 |
| JURKOVIC | Stefanov | Nitra | Hiza | CT | 0024 |
| JURSA | Dubova | Bratislava | Cooper | MI | BP-001A |
| JUST | Hrabusice | Spis | Just | TX | 1606 |