An Etymological Dictionary of the German Language/siedeln
Appearance
siedeln, vb., ‘to settle, establish,’ from the equiv. MidHG. sidelen; allied to MidHG. sëdel, OHG. sëdal, m. and n., ‘seat, settle, residence,’ a variant of Sessel, Goth. sitls (*siþls). There are several examples of the change of tl to þl (parallel to that of tn to þn in Boden). Comp. also Einsiedel.