coincidental

adj

1. Occurring as or resulting from coincidence.

   “Now, I don't know whether this is an example of nominative determinism – a phrase coined by the New Scientist to describe the phenomenon of one's name determining one's career – or aptonymy, the more coincidental occurrence of one's name being particularly fitting for one's personality, but I came across several such examples in the birding world.”

2. Happening or existing at the same time.