From Ancestry.ca
Robert A Hardie, 21, student, s/o James and Abigail Hardie married Matilda Kelley, 24, d/o John and Elizabeth Kelley, 27 Dec 1886 at Senica Haldimand County, witnesses; John Kelley of Seneca and Eva Hardie of Tillsonburg.
These are the same parents as listed on Herbert James Hardie's marriage registration.
Robert Alexander and Margaret Matilda Hardie both b Ontario arrived on vessel President Jackson from Kobe Japan to Victoria British Columbia 14 May 1935.
Destination: Brother, Wm J Hardie 839 Eighteenth Ave W, Vancouver BC.
On cenotaph information it gives a bit of a history of him including children's names.
Sarah Grace Warner, Eva Lillian Wilson, Annie Elizabeth "Bessie" Fisher, Marie Hardie, Gertrude Abigail Barnum, Robert W Hardie and Margaret Joy Hardie.
At Yanghwajn Foreign Mission Cemetery Seoul Korea.
Would appear that two daughters are buried there as well - Marie 1893-1893 and Margaret Joy 1903-1909 are named on the cenotaph.
.
http://www.findagrave.com/As he died in Michigan in 1949, he is likely buried in Michigan and the cenotaph is a memorial.
Children listed on Ancestry.ca of Robert Alexander Hardie and Margaret Elizabeth Kelly.
Arthur Sidney b 10 Jan 1888, died 31 Aug 1888 at Toronto of general debility.
Sarah Grace, 18 Dec 1896, Toronto
Eva Lillian, 14 Mar 1889, Toronto
The rest of the children must have been born in US or Korea.
Check US census for the children as they may have been sent back to Canada or US for schooling.
A family tree has Sarah Grace marrying Harold Herrick Warner.
Arriving in US 1912.
Living Lansing 1930 census
Died Jan 1983 Eaton Rapids Michigan.
From same tree
Lillian married Clarence Wilson. No more information given.