The poet William Butler Yeats's last name rhymes with hates. You can listen to Yeats pronounced on the youtube link cited below.
William Butler Yeats is generally regarded as one of the finest poets of the twentieth century. He was a great poet and a great Irishman, a member of the Irish Academy of Letter. In Yeats there was an extraordinary marriage of powerful imagination and the will to enforce it, a blend that set him above the ordinary.
"The Lake Isle of Innisfree" is a beautiful lyric poem. Its lyricism is emphasized by the use of alliteration and assonance in three quatrains of an abab rhyme scheme that expresses the speaker's nostalgia for the peaceful, tranquil life of his youth that he spent at Innisfree where he was always able to "have some peace." The controlling metaphor in this poem is the wish of the conflicted spirit of the speaker, who finds himself in an urban setting "on the pavements gray" while he longs to be in the setting of nature "where the cricket sings" and noon is a "purple glow."
You pronounce it as YATES, as if you are saying the word ate.