u-lth chin nih
The Navajo word áłchíní is a noun that means “children” in English.
Bá’áłchíní is how you refer to his/her children (in the third person).
Ellen bá’áłchíní dóó Jerry bá’áłchíní ólta’góó deeskai.
Ellen’s children and Jerry’s children are going to the school.
You can also use sha’áłchíní (“my children”), na’áłchíní (“your children”), niha’áłchíní (“our children”).