Suke means assistant, but what is the meaning of 'no.' I've seen 'no' translated as plain or field. Does it have any other meanings?
Below are a few -nosuke names that I discovered online.
Yukinosuke - Yuki comes from 幸 "happiness" or 雪 "snow". or a combination of 由 (yu) "reason" with 貴 (ki) "valuable" or 紀 (ki) "chronicle."
Hikonosuke- Hiko 彦 means prince
Hironosuke- Hiro 裕 means "abundant". 寛 means "generous, tolerant" and 浩 means "prosperous."
Kiyonosuke- 聖 (kiyo) "holy, sacred" or 清 (kiyo) "pure, clean."
Takanosuke- Taka 鷹 "hawk," or 高 "high"
Shironosuke- Shiro 白 "white" or 城 "castle"
Narunosuke- Naru possibly means 鳴る "to sound or echo,"
Hironosuke and Ryūnosuke are probably my favorites amongst the -nosuke names.
Here is a discussion of Japanese names an naming traditions that you might find interesting
http://www.sengokudaimyo.com/miscellany/names.html.