Alonzo Earl Foringer was a painter best known for his World War I Red Cross promotional poster, The Greatest Mother in the World.

Born in Kaylor, Pennsylvania, Foringer spent the early part of his life in Armstrong County.

Foringer received artistic training from Horatio S. Stevenson in Pittsburgh, then from Henry Siddons Mowbray and Edwin Howland Blashfield in New York City. Later, he moved to Saddle River, New Jersey.

A perpetual bachelor, Foringer's household included his brother, T. Milton, and his sisters, Lilian, Ire, and Edith. The Foringer name was important in local politics between Alonzo's art career and Milton's 31-year career on the Saddle River borough council.

He died December 8, 1948, in Saddle River, following an illness.

Foringer's former home in Saddle River is now a historic landmark, listed on the National Register of Historic Places.