Roman cognomen possibly meaning 'thick head of hair'; famously borne by Julius Caesar.
Few names in Western history carry the weight of Caesar. Its Latin origin is debated — ancient sources suggested a connection to "caesus," meaning cut, possibly referencing a birth by surgical means (though the historical Caesar was almost certainly not born this way), or to "caesaries," meaning a thick head of hair, or even to a Moorish word for elephant appearing in an ancestor's battle record. Whatever the etymology, Gaius Julius Caesar transformed his family name into the word for supreme power itself: Kaiser in German, Czar in Russian, each an echo of one man's outsized imprint on civilization.
Shakespeare's "Julius Caesar" fixed the name permanently in the literary imagination, giving it the dramatic gravity of "Et tu, Bruté" and the tragedy of ambition overreaching itself. The name appears in Christian tradition as well — several early popes bore it, and Caesar Baronius was a towering Counter-Reformation cardinal and historian. In the American Southwest and Latin America, César (the Spanish form) became a common baptismal name, most famously carried by César Chávez, the labor organizer and civil rights leader who redefined it as a name of moral courage rather than imperial conquest.
Caesar as an English given name has always been rare — too grand for everyday use, too freighted with history for parents seeking something neutral. Yet that very weight is its appeal: it is a name that announces itself, that asks something of its bearer. In an era when parents seek names with genuine historical depth, Caesar offers more history than almost any other.