| 52287 | Carmelo Etxegarai | 1 | 1899 | 1899 |
| 53038 | Carmelo Iraola | 2 | 1949 | 1949 |
| 42531 | Carmelo Iraola Segurola | 4 | 1962 | 1971 |
| 52528 | Casilda Larreta | 1 | 1817 | 1817 |
| 43649 | Casimiro Fernández Jimenez | 1 | 1992 | 1992 |
| 43679 | Casto Vidaurreta Gerediaga | 1 | 1955 | 1955 |
| 52896 | Catalina Agiagirre | 1 | 1673 | 1673 |
| 52400 | Catalina Aginaga | 1 | 1628 | 1628 |
| 52814 | Catalina Agirre | 1 | 1784 | 1784 |
| 53088 | Catalina Amas | 1 | 1704 | 1704 |
| 51996 | Catalina Andia | 3 | 1682 | 1705 |
| 52140 | Catalina Antonia Lujanbio | 1 | 1793 | 1793 |
| 52343 | Catalina Antonia Urkidizar | 2 | 1804 | 1807 |
| 52188 | Catalina Arrillaga | 1 | 1737 | 1737 |
| 52985 | Catalina Ateaga | 1 | 1697 | 1697 |
| 52413 | Catalina Beldarrain | 3 | 1674 | 1727 |
| 52964 | Catalina Bergerandi | 1 | 1695 | 1695 |
| 53031 | Catalina Beroiz | 1 | 1699 | 1699 |
| 52905 | Catalina Egiagirre | 1 | 1681 | 1681 |
| 52310 | Catalina Elizalde | 1 | 1637 | 1637 |
| 52880 | Catalina Etxeberira | 1 | 1663 | 1663 |
| 53027 | Catalina Etxegoien | 1 | 1699 | 1699 |
| 52772 | Catalina Garro | 1 | 1782 | 1782 |
| 53092 | Catalina Goieneta | 2 | 1706 | 1707 |
| 52938 | Catalina Irarreta | 1 | 1690 | 1690 |
| 52381 | Catalina Irazusta | 1 | 1715 | 1715 |
| 52072 | Catalina Obineta | 1 | 1752 | 1752 |
| 51784 | Catalina Otaegi | 2 | 1748 | 1748 |
| 52620 | Catalina Otegi | 1 | 1817 | 1817 |
| 52983 | Catalina Rekondo | 1 | 1697 | 1697 |
| 53190 | Catalina Sarasti | 1 | 1726 | 1726 |
| 52853 | Catalina Toledo | 1 | 1682 | 1682 |
| 53510 | Catalina Ugalde Anzisu | 1 | 1891 | 1891 |
| 52303 | Catalina Usobiaga Altuna | 1 | 1612 | 1612 |
| 51726 | Catalina Zelaia | 1 | 1711 | 1711 |
| 52995 | Catalina Zialzeta | 1 | 1697 | 1697 |
| 52063 | Catalina Zunzunegi | 1 | 1745 | 1745 |
| 42292 | Chocolates Suchard S.A.E | 6 | 1972 | 1973 |
| 42878 | Cía. Aizpurua y Cía. S.L | 1 | 1950 | 1950 |
| 52461 | Cipriano Insausti | 1 | 1820 | 1820 |
| 42497 | Circuitos Españoles de Apoyo | 1 | 1972 | 1972 |
| 52978 | Clara Zubillaga | 1 | 1696 | 1696 |
| 43150 | Claudio Bereziartua Mayoz | 1 | 1969 | 1969 |
| 43148 | Clementina Txapartegi Txapartegi | 1 | 1961 | 1961 |
| 43539 | Comisaría de Aguas | 1 | 1963 | 1963 |
| 43020 | Compañia Telefonica Nacional | 1 | 1950 | 1950 |
| 53681 | concejales del Ayuntamiento | 1 | 1734 | 1734 |
| 42406 | Concepcion Ortiz de Arriz | 1 | 1966 | 1966 |
| 53470 | Concepción Rekondo | 1 | 1813 | 1813 |
| 52234 | Concepción Soronda | 1 | 1809 | 1809 |
