Hi everyone, could anyone help me identify the artist of this oil painting please. Its an oil painting on canvas, 16" x 24" (40,5cm x 61cm)and its signed in the bottom left corner with the name JN PIERRE. I bought it on a car boot sale. I have tried to find the artist but had no luck, any help would be fantastic.

I forgot to mention another name written by pen at the back in top right corner "V. KRISTOFFERSEN." Any suggestions? My research leads me to nowhere. Thanks.