Yitzchak is the Hebrew form of Isaac, meaning "he will laugh."
Yitzchak is the original Hebrew form of the name known in English as Isaac, one of the oldest and most theologically laden names in the Western tradition. Its root is the Hebrew verb "tzchak" — to laugh — and the name itself means "he will laugh" or "he laughs." The etymology is narrative: according to the Book of Genesis, when the elderly Sarah was told by God's messengers that she would bear a son despite her advanced age, she laughed in disbelief.
Her son, born against all probability, was given the name Yitzchak as a monument to that moment of incredulous joy. It is a name born of laughter and miracle, carrying within it the full weight of the covenant between Abraham's family and God. Yitzchak is one of the three patriarchs of Judaism — Abraham, Isaac, and Jacob — making it among the most sacred names in Jewish tradition.
It appears throughout the Hebrew Bible, the Talmud, and Jewish liturgy. In the Ashkenazi world, the name was transmitted across generations in its Hebrew form for religious and communal purposes, even as the anglicized Isaac became the name used in secular or governmental contexts. Yitzchak Rabin, the Israeli prime minister and Nobel Peace Prize laureate assassinated in 1995, is perhaps the most internationally recognized modern bearer of the name, his legacy giving it a grave and heroic dimension.
Today, Yitzchak is used primarily within traditional and Orthodox Jewish communities, particularly in Israel and diaspora communities that maintain Hebrew naming conventions. For families choosing it in the twenty-first century, the name is an act of deep continuity — three millennia of laughter, faith, covenant, and survival concentrated into eight Hebrew letters.