My birth name is Brendan Dill, and I used this name personally and professionally until May 2015, when I married Dee Dee de Kenessey and took her last name as my own. It's a great name, but is apt to cause citation errors. Here's some clarification.
How to alphabetize 'de Kenessey': ignore the 'de'. 'de Kenessey' should be listed under K, e.g. between 'Kant' and 'Kripke'. See Kai von Fintel's excellent guide to alphabetizing prefixes like 'von' and 'de' in BibTex.
How to cite papers published under Brendan Dill: In the text, cite the paper under 'de Kenessey,' as in (de Kenessey and Darwall 2014). In the bibliography, alphabetize under 'de Kenessey' and include a note indicating the name the article was originally published under, e.g. "Originally published under the name Brendan Dill."
I am unreasonably fond of my two cats, Figaro and Rosie: