The name "Plouffe dit Sicard" was first listed in the marriage act of Pierre Plouffe and Angèle Lefebvre on feb 11, 1861 in St-Timothée, Beauharnois, Quebec. Pierre Plouffe dit Sicard is the grand-father of Alphonse Sicard.
As for the name "Secord" its first used began around 1911 when the Sicard family moved from the Russell county to the Timmins and Sudbury area. The pronounciation of "Secord" in English is similar to "Sicard" in french.