What does Khadija mean?
Khadija (خديجة, Khadija) is classically explained from the root kh-d-j with the sense of an 'early' or premature birth. Its prominence comes above all from Khadija bint Khuwaylid, the first wife of the Prophet Muhammad and the first person to accept Islam, so the name's religious and historical weight dominates its everyday meaning.
What does Dua mean?
Dua (دعاء, du'a') means 'prayer, supplication, invocation', from the Arabic root d-'-w. In Islamic practice du'a refers specifically to personal prayer or calling upon God.