Casper Eulberg was born in Meudt, Westerwaldkreis, Rhineland-Palatinate, Germany. In 1885 Eulberg purchased from Mathias Meller the Fulton Brewery in Galena Illinois, creating the Casper Eulberg & Sons Brewery with Adam and Peter. Casper Eulberg died on May 19, 1902, at the height of his brewery's popularity. His sons were forced to devote more time to the Galena Brewery at the expense of their own Portage Wisconsin brewery. Prohibition was a crippling blow to the Galena brewery. It came back in 1934 but closed down for good in 1936.

Mathias Meller was born in Germany. In 1860 Meller founded the brewery that would 25 years later become the Casper Eulberg & Sons Brewery. Meller died on April 1, 1900.