What does Isaac mean?
Isaac is from the Hebrew Yiṣḥaq, “he will laugh,” a reference to Sarah’s joy at his birth in Genesis.
What does Caleb mean?
Meaning genuinely contested. Traditionally derived from keleb, 'dog' (connoting a humble, devoted servant). Others split it as kol + lev, 'whole heart,' giving 'wholehearted' — a reading that suits the loyal spy of Numbers 13-14. Because the name shares the consonants k-l-b with 'dog,' that older reading cannot be cleanly ruled out; treat both as open.