דברי הימים א ב:יח פירוש: רש״י

And Caleb the son of Hezron begot Azubah Ishah Because he had a wife named Azubah, he named his daughter Azubah Ishah, as it is written (v. 19): “... and Azubah died, and Caleb took to himself Ephrath.” From here is deduced that he had a wife named Azubah.