Donna, I added those extra Maddrell marriages just for interest, because the name was relatively unusual in Maughold. Apart from the brother, I didn't see any likely to be related to your ones - but of course we can never be totally certain!
Let me know if you come across any other Maughold bdms you would like checked - bapts only until 1849, but marriages & burials to the 1920s - thanks to the huge amount of work Tom Corteen did with Maughold records. He died last year but was always happy to share.
The following entries are from his Maughold census transcripts, on the IOM family history online website for members only. If you haven't joined the soc. you would find it well worthwhile.
1841 [in 1841 places & relationships were not given; exact ages often not given for adults]:
1 13 59 Folieu William MOORE 41 Farmer Isle of Man
1 13 59 Folieu Ann MOORE 25 Isle of Man
1 13 59 Folieu William MOORE 3 Isle of Man
1 13 59 Folieu Margaret MOORE 2 Isle of Man
1 13 59 Folieu Elinor MADDRELL 14 FS Isle of Man.
1861 census:
2 33 Rhowne William JELLY Head MAR 40 Farming 14 acres German
2 33 Rhowne Ann JELLY Wife MAR 44 Lonan
2 33 Rhowne Ann MOORE Daughter UNM 17 Maughold
2 33 Rhowne Thomas MOORE Stepson UNM 14 Maughold
2 33 Rhowne Charlotte JELLY Daughter UNM 6 Maughold
2 33 Rhowne Elizabeth JELLY Daughter UNM 3 Maughold.
//
2 66 Ballacreggan Elizabeth TEARE Head WID 76 Farmer of 80 acres Ireland
2 66 Ballacreggan Maria TEARE Daughter UNM 35 German
2 66 Ballacreggan John KNEALE Servant UNM 25 Labourer Lezayre
2 66 Ballacreggan James KERMEEN Servant UNM 17 Labourer Maughold
2 66 Ballacreggan Cath CHRISTIAN Servant UNM 17 Servant Maughold
2 66 Ballacreggan Elizabeth JELLY Visitor UNM 18 Dressmaker Douglas
2 66 Ballacreggan Elinor CORKILL Niece 5 Maughold
2 66 Ballacreggan Emily CORKILL Niece 3 Maughold.
Sue