John Ernest
 John Ernest (May 6 1922 – July 21 1994) was an American-born constructivist abstract artist. He was born in Philadelphia USA in 1922. After living and working in Sweden and Paris from 1946 to 1951 he moved to London England where he lived and worked from 1951. As a mature student at Saint Martin's School of Art he came under the influence of Victor Pasmore and other proponents of constructivism.