Where does “नागरी” come from?

नागरी (Sanskrit) comes from Sanskrit नागर, from Sanskrit नगर, from Sanskrit गर, from Sanskrit गुरु, from Proto-Indo-Aryan gr̥Húṣ, from Proto-Indo-Iranian gr̥Húš, from Proto-Indo-European gʷréh₂us, from Proto-Indo-European -us — Forms adjectives from Caland system roots.