| 52955 | Juan Zarate | 1 | 1694 | 1694 |
| 52209 | Juan Zeberio | 1 | 1774 | 1774 |
| 51705 | Juan Zialzeta | 3 | 1697 | 1758 |
| 48231 | Juan Zubeldia | 1 | 1791 | 1791 |
| 52901 | Juan Zubeldia Urkola | 1 | 1677 | 1677 |
| 52286 | Juan Zulaika | 1 | 1646 | 1646 |
| 53674 | Juan Zunzunegi | 1 | 1741 | 1741 |
| 52398 | Juana Bautista Jaregieta | 1 | 1768 | 1768 |
| 53099 | Juana Bautista Korta | 1 | 1706 | 1706 |
| 52037 | Juana Francisca San Milian | 1 | 1826 | 1826 |
| 42500 | Juana Iturrioz | 1 | 1969 | 1969 |
| 52474 | Juana Josefa Zabala | 1 | 1880 | 1880 |
| 43440 | Juana Larrarte Garmendia | 2 | 1970 | 1971 |
| 53480 | Juana María Etxeberria | 1 | 1819 | 1819 |
| 52784 | Juana Regil | 1 | 1792 | 1792 |
| 51724 | Juanes Beobide | 1 | 1711 | 1711 |
| 47684 | Juanes Biurra Etxeberria | 1 | 1637 | 1637 |
| 42484 | Juanita Zubeldia Sorarrain | 1 | 1969 | 1969 |
| 48288 | Julian Agote | 1 | 1957 | 1957 |
| 42205 | Julian Goenaga Elola | 1 | 1976 | 1976 |
| 51698 | Julian Lizadi | 1 | 1729 | 1729 |
| 42710 | Julian Ormazabal | 3 | 1957 | 1976 |
| 42502 | Julian Ormazabal Murua | 1 | 1972 | 1972 |
| 42975 | Julian Ormazabal Murua | 1 | 1965 | 1965 |
| 52457 | Julián Sorarrain Sarasti | 1 | 1885 | 1885 |
| 53576 | Julián Usandizaga | 1 | 1878 | 1878 |
| 53572 | Juliana Irazu | 1 | 1878 | 1878 |
| 53665 | Juliana Irazusta | 1 | 1875 | 1875 |
| 42976 | Juliana Tapia Elola | 1 | 1965 | 1965 |
| 48277 | Julio Barcena | 1 | 1956 | 1956 |
| 43410 | Julio Bárcena García | 1 | 1952 | 1952 |
| 43505 | Junkers | 1 | 1965 | 1965 |
| 43024 | Justa Legarra Saizar | 1 | 1951 | 1951 |
| 53661 | Justa Zubizarreta | 1 | 1869 | 1869 |
| 52242 | Justina Sorarrain | 1 | 1640 | 1640 |
| 48255 | Karlos Iturbe | 1 | 1956 | 1956 |
| 52328 | Katalina Roteta | 1 | 1693 | 1693 |
| 42398 | Keelavite Hispania S.A. | 8 | 1960 | 1975 |
| 43068 | Komisaria Nagusia | 1 | 1960 | 1960 |
| 43730 | Kutxa | 1 | 1974 | 1974 |
| 48282 | La Estrella aseguru etxea | 1 | 1957 | 1957 |
| 47240 | Lazaro Amas Lizardi | 1 | 1659 | 1659 |
| 52927 | Lázaro Beobide | 2 | 1687 | 1689 |
| 53265 | Lázaro Esnal | 1 | 1769 | 1769 |
| 47663 | Lazaro Landa | 1 | 1764 | 1764 |
| 52203 | Lázaro Lizardi | 4 | 1687 | 1776 |
| 52378 | Lázaro Tapia | 1 | 1715 | 1715 |
| 52856 | León Etxarri | 1 | 1735 | 1735 |
| 51840 | León Lizaso | 2 | 1747 | 1765 |
| 53567 | Leonardo Lizaso | 1 | 1877 | 1877 |
