KANJI GUIDE
Thick, and by extension strong. 太陽 is the sun; 太鼓 is a drum.
The sky, and heaven with it. 天国 is paradise; 天気 is the weather.
Both kana for this sound — な and ナ — were made from 奈. And Japan has written foreign names with it for centuries: 加奈陀 is Canada. Yours is in good company.