[2] He was born to Leonard and Catharine Eichholtz, who owned and run the Bull's Head Tavern on East King Street in Lancaster; his father took part in the American Revolutionary War.
By 1805, Eichholtz opened his own shop in Lancaster where he, "mended sugar boxes, tinned copper kettles, and made coffee pots, wash basins, lanterns, stills, and funnels.
In 1818, he married Catharine Trissler of Lancaster, and they had nine children, Edward, Anna Maria, Elizabeth Susanna, Benjamin West, Angelica Kauffman, Rebecca, Henry, Robert Lindsay, and Lavallyn Barry.
[4][5] From 1808 to 1812, Eichholtz hired several workers to work in the shop, and devoted most of his time to offering his fellow Lancastrians, at first, painted tinware, and then, small profile portraits on wood panels, in order to diversify his business and satisfy his passion for drawing.
After developing his abilities as profile painter and gaining enough clients to sustain his family,[6] Eichholtz decided to make painting his main vocation.
At that time, Sully was not impressed by Eichholtz's attempts in painting calling them hideous; however, he left him his brushes as a gift before leaving Lancaster.
[8] As time passed, a reassessment of the significance of his achievements took place and "his portraits of Thaddeus Stevens and James Buchanan are generally accepted as the best that were done of these statesmen.