This family are slightly older than you mention but the names do appear to "fit"
Living in Bakiehow Road Tent,Meldrum,Aberdeenshire in the 1881 census we have
Donald STEWART aged 56, Tinsmith born in Crathie Aberdeen
his wife
Grace STEWART also aged 56 born in Larig, Ross and Cromarty
occupation given as hawker
Children
John STEWART, age 23 born in Forgue, occupation given as Tinsmith
(John appears to be married to Rachel aged 20 born in Forgue .... she is listed as Sons Wife, occupation Hawker)
Alexander STEWART aged 17,born Forgue, occupation Tinsmith
Allan STEWART aged 15 born Huntly ,unemployed
Francis STEWART,aged 10 born Towie, Aberdeenshire listed as unemployed