- A male given name.
From Middle High German rein, which also appears in reinkurni, reinifano (“tansy”), Modern German Rainfarn, for this plant’s growing as field mark, cognate with Icelandic rein, Swedish ren, Lithuanian raivė̃ (“furrow”), Latvian rieva (“furrow”), Latin rīma (“slit”), all perhaps related to Proto-Indo-European *h₁reh₁- and the antecedents of Reihe, English row, as well as to reif, English ripe.
- Rhymes: -aɪ̯n
- "Rain" in: Wolfgang Pfeifer (ed.), Etymologisches Wörterbuch des Deutschen (2nd ed. 1993).