John Smith & Matilda McCabe

my GGGG Grandparents were from Cavan, according to a family members Baptismal. John Smith & Matilda McCabe. They were born abt late 1790s. They were also discoverd in the Parish Records in Templemichael, Longford,where they had my aunt MaryBaptized. They imigrated to Canada abt 1820-30 s. I've recently found their burial in Canada in 2018. They lived to be elderly. They made it. Matilda died in 1858. What I dont know is where in Cavan they were from and who the Smith and McCabe family were. They were from Cavan but apparently lived in Longford too. I think their daughter Mary Smith did not imigrate. Thanks