From Old Norse finna, from Proto-Germanic *finþanan.
From Proto-Indo-European *pent-, *penth- (“to go, pass; path, bridge”). Cognate with Latin pons (“bridge”), Old Indian pánthā (“way, path”).
Related also to Old High German fendo, fendeo (“pedestrian, footsoldier”), Old Saxon fāþi (“walking”), Old English fēþe (“locomotion, walking, gait, pace”)
Descendants Old English: findan Scots: find, fynd English: find Old Saxon: findan Old Dutch: *findan Dutch: vinden Afrikaans: vind Old High German: findan Middle High German: vinden German: finden Old Norse: finna Icelandic: finna Faroese: finna Swedish: finna Danish: finde Norwegian: finne Gothic: (finþan)
I guess there must have existed some common changes in the Old Norse branch, for the daughter languages of that branch altogether lost the "d".
Does anyone know what the name of these phenomena?