The name Leviathan is a boy's name of Hebrew/Israeli origin meaning "twisted, coiled; in modern Hebrew - whale". Leviathan and is often added to lists like Names with Animal Meanings and discussed in our forums with posts like "Yes or No Game for Your WHOLE Signature!".
From the experts:
Leviathan was a name given to 24 boys in the USA in 2014. It makes a rather unusual Biblical choice, being the name not of a man or angel, but of a sea monster. In literature and popular culture, the term Leviathan has since come to be used as a synonym for any gargantuan, monstrous creature or object (think of the bag in VEEP). Before this meaning turns parents-to-be off, the term leviathan in modern Hebrew simply means whale, making this a great choice for parents looking for an unusual nature name.