No specific church and the year is 1742 IIRC
The church would have been St Runius Church.
St Runius, Marown ("Old Marown Church") dates to the 12th century and was the parish church of Marown until 1853. Today it only holds services for special occasions.
Just found this:
Thomas Christian (1754–1828) was the second son of John Christian (1728–1779), Vicar of Marown for 26 years, from 1753 to 1779, and his wife Elizabeth. Thomas Christian's father is notable for having translated the Second Book of Kings from the Bible into the Manx language.
After his father's death in September 1779, Thomas Christian became Vicar of Marown,
moving into the manse at Ballakilley and taking up the post of Vicar in 1780. He thus followed both his father, John, and grandfather, Thomas, in being Vicar of the Parish, a line which began with his grandfather's appointment in 1734.
https://en.wikipedia.org/wiki/Old_St_Runius,_MarownPossible family?