'Of the Trinovantes', a tribal name, perhaps 'very energetic people' from Celtic *"tri-" (intensive) + *"now-" 'energetic', related to *"nowijo-" 'new' (Welsh "newydd")
From Brittonic *"weru-" 'broad' + *"lam-" 'hand' [from Celtic *"(φ)lāmā"] (Welsh "llaw", Irish "láimh")
First element from Celtic *"windo-" 'white' (Welsh "gwyn"); in "Vindolanda", Celtic *"landā" 'land, place' (Welsh "llan").