My Dad used to sing BROTHER CAN'T YOU SPARE A DIME, which I still sing. Apparently he used to serenade my Mum with STARDUST, which I also still sing. Sadly I only heard about him singing that song until after his death.   He was a scoutmaster, so also knew all the usual campfire songs, too many to mention.
My mother knew all the popular songs from the radio and sang them round the house, in a very musical voice.
Neither were "folk-singers" or sang in public (apart from scout camp fires) but, more and more, I realise that their humble (and tuneful)
singing was a great influence on me - probably as much as the radio
and all the great records I started listening to.