A coat of arms is a symbol that represents a country, institution, family, or Royal Personage.
http://www.houseofnames.com/xq/asp.c/qx/sherbrooke-coat-arms.htm I think that is the coat of arms. Not completely sure though. Regards
Marriage, promotion, acquisition of additional titles, receipt of honors.
Try the Drake family (descendants of Francis Drake) and Goodwinson descendants of early English Kings. See also the Bayeux tapestry.
The White stripe has a shield of 2 rifles to represent protection if there's war, the olive branches represent peace, and the quetzal bird represents independence when the other countries separate...