Fortuitously
The Century Dictionary and Cyclopedia
Accidentally; casually; by chance.
Wiktionary, Creative Commons Attribution/Share-Alike License
adverb.
In a
fortuitous
manner.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adverb.
by good fortune
Word Usage
"The trespasser, quite fortuitously, is Judge Witberg."