Hi, You know that Eliza - married Martin Vern HOLWAY - in 1890 at Pincher Creek Alberta
Provincial Archive - may hold some records re marriage. in that time frame.
Govt of Alberta Vital Statistics Registry office in Edmonton - may be able to advise - if information is available -
Registration of Marriage - even in the early days - will show the Maiden name of the Bride - and the name of the Groom. [ early regs may or may not show names of parents - and other information found in more current registrations.
Are you certain about the names of the children?
daughters given first names of 1. Maria Ann 2. Maria sons: 1. William Henry 2. William Otis
Birth Registrations of the Children - may show the maiden name of the mother
Marriage Registrations for the children,
Charles, Maria Ann, Maria, William Henry, William Otis and Horace -
will show the names of the parents of the bride and groom - including maiden names of the mothers.
Do you know what religion the family practiced :
church Records - re the marriage of Eliza - and Martin Vern HOLWAY - and baptisms of the children - may show the maiden name for Eliza
Do you know When/ Where - any of the family members passed away?
Have you searched - Canada Census - to 1921 - ?