Correct spelling for the English word "Aleine" is [ɐlˈiːn], [ɐlˈiːn], [ɐ_l_ˈiː_n] (IPA phonetic alphabet).
The word "Aleine" is believed to have originated from the Old French word "alain", which in turn is derived from the Latin word "alanus". "Alanus" referred to a type of dog, specifically a breed of hound originating from the Alans, a nomadic people of medieval Eurasia. Over time, the word "alain" evolved and found its way into Middle English as "aleine", retaining its meaning of a particular breed of hound.