Stem أَيُّ has 3 unique word forms and appears 11 times in the Quran.

Word Translation Occurrences
أَيُّهُمۡ (as to) which of them, those of them, which of them 10
أَيُّكُمۡ which of you 8
أَيُّنَآ which of us 2
أَيُّهُم which of them 2