There are 2 Philip Mylreas with MIs in Braddan
one was b 15 Feb 1817 died 8 Sep 1888
The other died 12 May 1926
Both are buried in the same grave #1009

Section Two
#1009
In memory of PHILIP MYLREA late Schoolmaster of St Marks born Feb 15th (1817) died Sept 8th 1888
also the Loved Mmeor f (?) MARGARET wife of the above born May 26th 1829 died March 6th 1902
also ARABELLA FRANCES fifth daughter of the above born March 24th 1863 died April 16th 1863
also ALFRED WILLIAM third son born Dec 27th 1864 died at South Brisbane Australia August 14th 1893
also PHILIP eldest son died at Florida, USA May 12th 1926

The Philip you mentioned doesn't have an MI