hospodar (n.)

former title of appointed Ottoman governors of Moldavia and Wallachia, 1680s, from Old Church Slavonic gospodi "lord, master," literally "lord of strangers," from gosti "guest, friend," from PIE *ghostis- "stranger" (from root *ghos-ti- "stranger, guest, host"); second element from PIE root *poti- "powerful, lord" (see potent). Compare host (n.1).