"Wally Wally" and "the Water is Wide" have similar(if not identical) melodies, and share a common lyric at one point. But the lyrics as a whole are different. "Wally Wally" is English where "The Water is Wide" is Irish is another difference. Both songs are avalable on the database( I know cause I looked both up out of curiosity).Insedently, another similar song to "The Water is Wide" is "Karrickfergus"(sp?). The Chorus is very similar to the first verse of "The Water is Wide"