your 1st mentioned Robt Brown b 1713 son of John Brown + Cath Corris - mentioned in Cath's will of 1747 and a deed dated 1737 from John + Cath selling him their house in Castletown after their decease - Robert(by then in Douglas) + wife sold the house in 1748 - can't however see a death/burial for John
Details in the various deeds on my CD)