Uchiha
うちは
Full name: うちはサスケ (Uchiha Sasuke)
Uchiha has no kanji. The manga writes it うちは, in hiragana, and that is the whole spelling. Fan sites sometimes invent characters for it, but they are not from the series.
Spelling checked against this reference.
There is no kanji here
This name is written in kana in the original, so it has no characters to take apart and no hidden meaning to find. Sites that show you kanji for it are showing you something the series never used.