What does Rien mean?
Rien /rien/ [1 syll.] 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 version of Marino (Latin). Rien is also a variation of Ryan (Gaelic): also possibly (Gaelic) "water".
How popular is Rien?
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, Ryan (#37 last year) and Ryne are the popular alternative forms of Rien (not in Top 1000). Forms like Ries are uncommon. Adoption of these boy names reached its most widespread in 1990 (usage of 0.4543%) and has become much less since (usage 0.321%, down 29.3%), with the form Ryne becoming less fashionable. Ryan (#37) is the most chic boy name in this list. (Top 1000 Birth Names Statistics, 2014)