Callister/Collister
Just a guess but closes fit for your John Callister/Collister is one christened 30 Mar 1810 Malew s/o William Callister & Martha Fargher who md 14 Oct 1809 Malew.
Cottier
Dinah isn't a very common Manx name as far as I know.
There is a Dinah Cottier b 1785 d 1852 who md a John Kelly in German
Dinah was d/o Silvester Cottier & Jane Craine of German. There were at least 3 sons who very well might have named one of their daughters after their sister Dinah. Dinah Cottier Kelly was buried in Marown. She was in the 1851 census
1851 Marown
, 03-49, 013, CRETNEY, James, Braaid, Head, Married, 40, Ag Lab, Marown
, 03-49, 013, CRETNEY, Catherine, Braaid, Wife, Married, 37, , German
, 03-49, 013, CRETNEY, Robert, Braaid, Son, , 10, , Marown
, 03-49, 013, CRETNEY, Thomas, Braaid, Son, , 10, , Marown
, 03-49, 013, CRETNEY, Catherine, Braaid, Daughter, , 6, , Marown
, 03-49, 013, CRETNEY, Caesar, Braaid, Son, , 4, , ,
, 03-49, 013, CRETNEY, Elizabeth, Braaid, Daughter, , 1, , ,
, 03-49, 013, KELLY, Dinah, Braaid, Mother in Law, Widow, 66, , German

There are 2 Cottier families living in Marown next to your folks--I don't know who they are, William & Caesar
, 03-68, 090, COTTIER, William, Eairy Jorey, Head, Married, 57, Farm 22 Ac, Marown
, 03-68, 090, COTTIER, Catherine, Eairy Jorey, Wife, Married, 45, , Braddan
, 03-68, 090, COTTIER, Ellinor, Eairy Jorey, Daughter, , 12, , Marown
, 03-68, 090, COTTIER, Elizabeth, Eairy Jorey, Daughter, , 7, , Marown
, 03-68, 090, COTTIER, Christiana, Eairy Jorey, Daughter, , 4, , Marown

Caesar Cottier & Margaret Craine md 16 APR 1842 Braddan

, 03-68, 092, COTTIER, Caesar, Cottage Eairy Jarey, Head, , 37, Lead Miner, Marown, Morrison
, 03-68, 092, COTTIER, Margaret, Cottage Eairy Jarey, Wife, , 32, , Braddan, Morrison
, 03-68, 092, MORRISON, John, Cottage Eairy Joney, Nephew, , 5, , Braddan, Cottier