It looks like the two older children, John and Jane, were born before the probable parents JJ Christian and Jane Criggal, however spelled, were married in 1886
CHRISTIAN, John James Clark 16 Sep 1886 R A1 36 CRIGGALL, Jane

Children
CRIGGAL, John James Cl 27 Nov 1880 Ram 97 Not given CRIGGAL, Jane

CRIGGALL, Jane 5 Nov 1882 Ram 124 Not given CRIGGALL, Jane

JJ Christian seems to have acknowledged both as they were known as Christian by the 1891 census
1891, Ramsey,district 1, schedule 173, 3 Loch Villas
John Christian, head, married, 38, plasterer, Ramsey
Jane, wife, married, 28, Ramsey
John, son, 10, single, scholar, Ramsey
Jane, daughter, single, 8, scholar, Ramsey
Annie, daughte, single, 6, scholar, Ramsey
Myra, daughter, single, 4, scholar, Ramsey
Frederick, son, single, 1, scholar, Ramsey

The parents MI
Lezayre New West Yard
A 84/A 86
Sacred to the memory of John James Christian plasterer born 21st December 1852 died 4th July 1928
and Jane his dearly loved wife born 5th January 1863 died 8th November 1934
Frederick their dearly loved son born 18th July 1890 died 20th July 1951
Myra their dearly loved daughter born 24th May 1887 died 13th February 1955
Annie their dearly loved daughter born 11th January 1885 died 14th September 1962
Lena their dearly loved daughter died 5th October 1969 aged 70 years