Yiddish is spelled as Y-I-D-D-I-S-H.
There is no equivalent Yiddish name for Robert. But you can spell Robert in Yiddish as ראָבערט
Jenna in Yiddish = ×“×©×¢× ×¢ For comparison, Jenna in Hebrew = ×’×³× ×”
In Yiddish, the word for cat is "ืงืึทืฅ" which is transliterated as "kats".
יארצייט.
시에라 = Sierra
In Yiddish, the word "eight" is spelled as "ืึทืื" (pronounced as "akh't").
Kibitz = קיבעץ
Khazn
Aidele = איידעלע
You spelt it correctly.
In Yiddish, the name Ruchel is spelled ืจืืื.