Eleanor Quinney looks to be illeg d/o Cath Cowin (who married John Mylchreest in 1835)and John Quinney of Marown - in presentments Oct 1831 under Malew but I never found a baptism (at least not in extracted records)

your newly found John is with Elizth Cowin in 1861 described as nephew - I suspect this Eliz has incorrectly reported her age (nearer 55)and is d/o Thomas Clague + Isable Quilliam and is sister to Cath Cowin (who is dead bur Malew (from Arbory) Jan 1851