the earliest EISLER I know some data of in my family, is HENRICH HENRIK EISLER from Hungary with possible Austro-background. He was Born 1820, Married 1842 and Died 1893. I have no information about any of his possible siblings. Heinrich's spouse Katharina Katalin Maier, also an Austrian possibility by that name.
Their son, ARNOLD EISLER Born 1845, Sept. 9 in Budapest, Wife Julia Moskovitz Nagybecskerek Born 1850 Married 1870, Died 1908. Arnold was one of 7 siblings. This is the side of the family I come from, with Arnold beingh my great-grand-father. If you feel, there may be some common ground, I'd love to hear from you.
My name was changed from EISLER to ELO"D and then to ELOED
Many of the Eislers have a German, or rather an Austrian background, and some Eislers have emmigrated to various parts of the world.
Are you trying to track the naming of a wagon, or is this search-question part of your family-genealogy?