I take judicial notice of the fact that it is no longer uncommon for parents, particularly mothers, to have different surnames from that of their children. It is not uncommon for women to retain their birth names after marriage and to have different surnames from their children as a result. Because of the “current variety of family formats within Canadian society and Canada’s multicultural values” (see Lipphardt v. Chan, 2006 ABQB 511,  A.J. No. 833, Veit J.) it is not uncommon for children have different parents than their step or half siblings, and thus different surnames.
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