Where does “Issac” come from?

Issac (English) comes from English Isaac, from Middle English Ysaac, from Latin Isaac, from Ancient Greek Ἰσαάκ, from Hebrew יצחק — to laugh.

Ancestry of “Issac”, step by step

Step	Language	Word	Meaning
1	English	Isaac	—
2	Middle English	Ysaac	—
3	Latin	Isaac	—
4	Ancient Greek	Ἰσαάκ	—
5	Hebrew	יצחק	to laugh

Issac — Etymology, Origin & Word History | Etymology Explorer