
1) Shakespearean twin 2) The Comedy of Errors servant
Found on
https://www.crosswordclues.com/clue/dromio

http://books.google.com/books?id=cw7lWraJrXkC The railroad of the Pochuck Railroad Company, herein called the Pochuck Railroad, is a single-track, standard-gage, steam railroad, extending from Glenwood Junction, N. Y., to Glenwood, N. J., 3.424 miles. The Pochuck Railroad was incorporated April 23, 1897, under the general laws of the State of New ...
Found on
http://en.wikipedia.org/wiki/Dromio

Dromio is the name of two twin brothers; Dromio of Ephesus and Dromio of Syracuse. They are attendants on the two antipholuses in The Comedy of Errors.
Found on
http://www.probertencyclopaedia.com/K1.HTM
No exact match found.