吉田、芳田、良田、佳田、由田、義田、喜田...
Just because *one* way of writing it is most likely, that doesn't guarantee it is the correct way in this instance.
Even in English, when you hear a name, you can't be sure if it's Jenson or Jensen, or Stewart or Stuart, Wilde or Wylde or Wild or Wyld, or Cattrell or Cattrall or Catrall or...
Every language has funky spellings in names, it seems.