Eustaquio married Claudia Lecertua Aboitiz on 27 May 1908 in Nampa, Idaho. Claudia (daughter of Juan Jose Lecertua Zaldegui and Claudia Aboitiz Foruria) was born on 26 Mar 1880 in Ereño, Bizkaia; died on 03 Mar 1969 in Meridian, Idaho. [Group Sheet] [Family Chart]

1. Pilar Cortabitarte was born on 27 Jun 1908 in Delamar, Idaho; died on 23 Dec 1992 in Boise, Idaho.
2. Agueda Cortabitarte was born on 18 Jul 1911 in Delamar, Idaho; died on 04 Nov 1992 in Boise, Idaho.
3. Jess Cortabitarte was born on 13 Apr 1915 in Jordan Valley, Oregon; died on 09 Apr 2000 in Boise, Idaho.
4. Joe Cortabitarte was born on 03 Dec 1913 in Jordan Valley, Oregon; died on 01 Sep 1992 in Boise, Idaho.
5. Isaac Cortabitarte was born on 24 Feb 1917 in Jordan Valley, Oregon; died on 26 Jan 2011 in Arizona.