Jose married Maria Josefa Urquiza Arano on 9 May 1881 in Berriatua, Bizkaia. Maria (daughter of Domingo Urquiza Asumendi and Maria Ygnacia Arano Elordi) was born on 17 Sep 1858 in Berriatua, Bizkaia; died on 12 Mar 1888 in Berriatua, Bizkaia. [Group Sheet] [Family Chart]

1. Felix Plaza Urquiza was born on 20 Nov 1883 in Berriatua, Bizkaia.
2. Emeterio Plaza Urquiza was born on 04 Mar 1888 in Berriatua, Bizkaia; died in Nov 1967 in Reno, Nevada.

Jose married Joaquina Urquiza Arano on 27 Aug 1890 in Berriatua, Bizkaia. Joaquina (daughter of Domingo Urquiza Asumendi and Maria Ygnacia Arano Elordi) was born on 17 Aug 1862 in Berriatua, Bizkaia. [Group Sheet] [Family Chart]

1. Jose Domingo Plaza Urquiza was born on 04 Sep 1893 in Berriatua, Bizkaia.
2. Juan Plaza Urquiza was born on 11 Jul 1896 in Berriatua, Bizkaia.
3. Maximiano Plaza Urquiza was born on 08 Jun 1899 in Berriatua, Bizkaia.