10th cent. From Latin vadum "ford."
From Proto-Italic *waþo- 'id.' From Proto-Indo-European *u̯h2dh-o- 'id.'
Romance: Western Vulgar Latin: Portuguese vau, French gué, Italian guado ; Eastern Vulgar Latin: Romanian vad ; Sardinian: badu
Indo-European: Celtic: Welsh go-di-wawd "overtook;" Germanic: Old Norse vað "to wade," Old High German watan 'id.,' Old English wadan 'id.' (English to wade)