What does Izaac mean?
Izaac /iza-ac/ as a boys' name is of Hebrew derivation, and the meaning of the name Izaac is "laughter". Izaac is an alternate spelling of Isaac (Hebrew) with the prefix Iz-.
How popular is Izaac?
Izaac is an uncommonly occurring given name for men. Izaac is an unusual last name too for all people. (2000 U.S. Census)
Below is a charted analysis of the statistics of the boy name Izaac and associated names. Isaac (#31 in 2014), Issac (#553), Isaak and Isak are the popular related forms of Izaac (not ranked) rated in the Top 1000. Usage of these forms of Izaac was at its apex in 2001 (usage of 0.438%) and is almost as widespread today (usage 0.354%, ▼19.1%), but with the form Isaak becoming somewhat dated. Isaac is more universally found than the rest, although Issac seems to be becoming a favorite too. (2014 U.S. SSA Records)
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