The uniqueness of names and divine designation

يَـٰزَكَرِيَّآ إِنَّا نُبَشِّرُكَ بِغُلَـٰمٍ ٱسْمُهُۥ يَحْيَىٰ لَمْ نَجْعَل لَّهُۥ مِن قَبْلُ سَمِيًّا

[He was told], "O Zechariah, indeed We give you good tidings of a boy whose name will be John. We have not assigned to any before [this] name."