My name book says that it's an Irish Gaelic name derived from Latin meaning tiger (the Latin name for the animal is Panthera tigris). Apparently, the similarity with the river's name is coincidental (which came about by the Greek translation of the Persian word Tigra into Tigris).
There are 7 people with the name Tigris in the US.
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Please, vote on my list:
http://www.behindthename.com/pnl/65993This message was edited 11/11/2010, 2:03 PM