Yes, Amanda, there are Garrett's on the Isle. Would suggest you apply to the Registry for a copy of your G-grandfather's marriage certificate which should at least give the names of his parents and also your G-grandmother. Alternatively, apply for a copy of his birth registration which would give your G-grandfather's parents also and their residence at that time. My main search name is also Garrett so if we can get back a little in time, there might be further help. Mary