| 47371 | Bartolome Elola Urdapilleta | 1 | 1764 | 1764 |
| 52728 | Bartolomé Ignacio Loinaz | 1 | 1826 | 1826 |
| 52070 | Bartolomé Insaurandiaga | 1 | 1751 | 1751 |
| 51974 | Bartolomé Lomaz | 1 | 1818 | 1818 |
| 52623 | Bartolomé Mujik | 1 | 1820 | 1820 |
| 52162 | Bartolomé Mujika | 3 | 1819 | 1830 |
| 53200 | Bartolomé Olazabal | 1 | 1718 | 1718 |
| 51941 | Bartolomé Ostolaza | 7 | 1771 | 1871 |
| 51855 | Bartolomé Sorarrain | 2 | 1771 | 1789 |
| 52971 | Bartolomé Toledo | 1 | 1696 | 1696 |
| 48201 | Bartolome Udakiola Goieneta | 1 | 1773 | 1773 |
| 52091 | Bartolomé Ulanga | 1 | 1767 | 1767 |
| 53268 | Bartolomé Uranga | 1 | 1770 | 1770 |
| 48135 | Bartolome Urdapilleta | 1 | 1752 | 1752 |
| 52690 | Bartolomé Usabiaga | 1 | 1776 | 1776 |
| 52117 | Bartolomé Usobiaga | 1 | 1784 | 1784 |
| 53070 | Basilio Begiristain | 1 | 1875 | 1875 |
| 53427 | Bautista Alkain | 1 | 1792 | 1792 |
| 52260 | Bautista Eguzkiza Zialzeta | 1 | 1672 | 1672 |
| 52733 | Bautista Irarreta | 1 | 1684 | 1684 |
| 52615 | Bautista Larrunbide | 1 | 1809 | 1809 |
| 52677 | Bautista Usobiaga | 1 | 1770 | 1770 |
| 52040 | Bautista Zelaia | 1 | 1693 | 1693 |
| 43156 | Begoña Altuna Ayerza | 1 | 1971 | 1971 |
| 52289 | Belauntzako Udala | 1 | 1721 | 1721 |
| 52121 | Beltrán Garballón | 1 | 1785 | 1785 |
| 51697 | Benito Antonio Barreda | 1 | 1776 | 1776 |
| 42236 | Benito Ayerza | 1 | 1971 | 1971 |
| 53186 | Benito Etxeberria | 1 | 1818 | 1818 |
| 43070 | Benito Martin Sanchez | 1 | 1967 | 1967 |
| 42442 | Benito Usabiaga | 1 | 1968 | 1968 |
| 42725 | Benito Usabiaga Beobide | 1 | 1968 | 1968 |
| 53138 | Bentura San Millán | 1 | 1713 | 1713 |
| 51679 | Berastegi | 1 | 1694 | 1694 |
| 52252 | Bernardo Alkain | 5 | 1805 | 1811 |
| 53477 | Bernardo Antonio Azpiazu | 1 | 1817 | 1817 |
| 52223 | Bernardo Antonio Etxeberria | 5 | 1788 | 1799 |
| 43021 | Bernardo Astiazaran | 1 | 1951 | 1951 |
| 42959 | Bernardo Astiazaran Ugalde | 1 | 1950 | 1950 |
| 53468 | Bernardo Etxaburua | 1 | 1810 | 1810 |
| 52397 | Bernardo Etxenagusia | 3 | 1768 | 1777 |
| 52976 | Bernardo Mujika | 1 | 1696 | 1696 |
| 42973 | Bibiana Garmendia Ugalde | 1 | 1965 | 1965 |
| 53694 | Bost Machine Tools Company S.L.U. | 1 | 1974 | 1974 |
| 43380 | Buruntza mankomunitatea | 1 | 1974 | 1974 |
| 48257 | Calvo Sotelo | 1 | 1956 | 1956 |
| 42977 | Cándido Saez Oyarzabal | 2 | 1963 | 1965 |
| 43535 | Carburos Metalicos S.A | 1 | 1969 | 1969 |
| 43161 | Carlos Berra Botana | 1 | 1971 | 1971 |
| 51671 | Carlos I | 2 | 1534 | 1534 |
