On 10 JUL 1894 when John A. was 33, he married Mabel CAMERON. Born on 5 JAN 1877 in Bridgeville, Nova Scotia, Canada.
Mabel moved to Chilliwack, British Columbia, Canada, but it is unclear whether she moved with John or after his death.

On 10 JUL 1884 when Margaret C. was 21, she married Simon Archibald THOMPSON, son of William THOMPSON (1814-1893) & Elizabeth MACDONALD (1824-1900). Born in 1854. Simon Archibald died in St. Pauls, Pictou County, Nova Scotia, Canada, in 1933; he was 79. Buried in Bridgeville Cemetery, Nova Scotia, Canada.
Simon Archibald Thompson appears on the 1881, 1891, 1901 Census of Pictou County, Nova Scotia, Canada

William married Margaret Jessie CHISHOLM. Born on 20 MAR 1875 in Springville, Nova Scotia, Canada. Margaret Jessie died in 1951; she was 75. Buried in Springville Cemetery, Nova Scotia, Canada. Was on the census for 1901 Census.

On 7 JUL 1888 when Catherine M. was 19, she married John MACMILLAN, son of Donald MACMILLAN & Jessie. Born on 7 JAN 1858 in Sunnybrae, Nova Scotia, Canada. John died in 1934; he was 75. Buried in Bridgeville Cemetery, Nova Scotia, Canada. Resided in Springville, Nova Scotia, Canada. Occupation: Farmer. in Rev. William McMillan. in Duncan McMillan and William McKenzie.
The following information was sent to me by my Internet friend, Doug Grant:

In more complete response to an earlier question, the marriage records of Pictou County, consulted at the Nova Scotia Archives, have the following information regarding John McMillan and Catherine McKenzie:

Page 31, line 65 of records for 1888:

7 July 1888, Centredale, Church of Scotland

John McMillan, 29, bachelor, farmer, res. Springville, born Sunny Brae, s/o Donald (farmer) and Jessie, married
Cassie M. McKenzie, 20(?), spinster, Centredale, d/o William (farmer) and Catherine

Witnesses: Duncan McMillan, Wm. McKenzie
Ceremony performed by Rev. Wm. McMillan

Doug Grant