Rare term; the standard modern word is ロシア人. May appear in historical or literary contexts.
See also: ロシア人
The notation '露人' can be seen in this old document.
Rare kanji spelling using the character 露 for Russia. The more common term is ロシア人.
Alternate rare kanji spelling using 魯 for Russia. Even less common than 露人.
From 露 (Ro, abbreviation for Russia) + 人 (person). The character 露 is an ateji abbreviation for 露西亜 (Russia).