Russian and German form of Isaac; also Greek Old Testament form of Isaac.
Biblical namesake: Isaac was the long-awaited son of Abraham and Sarah, remembered for his role in the covenant and as father of Jacob and Esau. (Genesis · Genesis 21, Genesis 22, Genesis 26)
Saintly namesake: Isaac the Syrian was a 7th-century monk and theologian known for his spiritual writings. He is one of several saints named Isaac. (January 28 · 7th century)
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Names related to Isaak through nicknames, language, or historical forms.