Jordan is possibly a biblical name that means "descend" or "flow down". So Jordan has led itself to being a name used for males or females, but Jordana is strictly for females.This is just a masculine name that talks about baptisting children and I don’t think it has anything to do with the name Jordan being originally masculine, but I do think it’s more of a masculine name. It could be originally masculine, I take that back!
― Anonymous User 1/26/2019
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The name didn't die out in the Middle Ages in the UK; it wasn't common, but there is documented consistent use from the 1400s to now.
The origin is slighly different: it's composed actually of the hebrew words: YARAD (to desend) and DAN (which is the name of the river from which JORDAN River descends). YARAD + DAN => YARDAN => JORDAN.