Iyyaan is a Quranic name for boys and girls meaning time, era, epoch. It is another version of the name Ayan, with the exact same meaning. Iyyaan and Ayan are the same word with the same spelling in Arabic in the Quran, the word can be read as either Iyyaan or Ayan without changing the meaning, therefore some read it as Iyyaan and others as Ayan.