Isidor

Isidor is a masculine given name of European origin. It is a variant of Isidore, derived from the Greek Isidoros, and is commonly interpreted as "gift of Isis" or, more generally, "gift." The name appears in various languages with spellings such as Isidor, Isidro, Isidore, and Isidoro, and can also function as a surname in some cases.

The name has historical presence in Christian Europe, in part due to Saint Isidore of Seville (Isidorus Hispaliensis), a prominent scholar and archbishop. The saint's influence contributed to the spread of the name across Latin Christian communities, and it later permeated many European languages. In modern usage, Isidor is common in German-speaking areas; Spanish-speaking regions may use Isidro or Isidoro; other languages retain Isidor as a form of Isidore.

Notable people named Isidor include Isidor Straus, a 19th–early 20th century American businessman and co-owner of Macy's, and Isidor Isaac Rabi, a Nobel Prize–winning physicist. The name also appears in literature and folklore within various European cultures, reflecting its long historical presence.

The spelling Isidor continues to be used today, highlighting the name's cross-cultural longevity and its connection to the broader Isidore family of names.