Hello Mary,
Yes, I think Booilevelt and Ballavelt are the same place. And Margher-e-Kew where they were for one of the censuses isn't far away.
I have a whole lot of other stuff I put together about the two families when I was trying to sort out which was which, and I'll post the Maughold ones when I get them tidied up. (Night here now, so it might be tomorrow.)
Does anyone know what areas/farms would be included in "The Curragh", Maughold?
Thanks,
Sue