köken: From Proto-Finnic *kakko ~ *kaakko (“southeast”). Cognate to Estonian kagu and Ingrian kakko. Possibly related to kaakkuri, in which case the cardinal direction meaning could derive from a meaning like "the direction where migratory birds come from".
köken: Cognate to Finnish kaakko (“south-east”) and Ingrian kakko (“south-east”). Most likely the same root as in kakerdama (“to move in an uncertain manner”).
By surface analysis, keşiş (“monk”) + -le + -me, after Keşiş Dağı (“Uludağ”, literally “monk mountain”), which was located in the southeast of Istanbul.