What does Rien mean?
Rien \rien\ as a name for boys is of Latin and Gaelic derivation, and the meaning of the name Rien is "of the sea; king". Rien is a derivative of Marino (Latin). Rien is also a variation of Ryan (Gaelic): also possibly (Gaelic) "water".
Rien is a rare first name for males but a somewhat popular last name for all people (#96480 out of 150436, Top 64%). (2000 U.S. Census)
Below is a graphed comparison of the usage of the boy name Rien and corresponding names. Rian and Ryan (#37 last year) are the popular alternative forms of Rien (#unlisted). Adoption of these boy names reached its most widespread in 1991 (usage of 0.4945%) and is almost as widespread today (usage 0.4815%, down 2.6%). Ryan (#37) is the most chic boy name in this list. (Top 1000 Birth Names Statistics, 2014)