The passing of the following philosophers was noted on the blog this year: Aldo Antonelli, John Arras, Robert L. Arrington, Claudia Card, Leigh S. Cauman, Keith Donnellan, Richard Flathman, John Forrester, Roger Gibson, Jaakko Hintikka, Georg Kreisel, Michael L. Martin, Peter Menzies, William L. Rowe, Irving Singer, Alan Wertheimer.
You can see last year's list here.
ADDENDUM: Here's one I missed, Burleigh Wilkins (emeritus, UC Santa Barbara). (Thanks to Aaron Thomas for the pointer.)
ANOTHER: D.D. Raphael (born 1916) also passed away just before Xmas. (Thanks to Matt Kramer for the information.)
AND ALSO Richard Gale. (Thanks to Bob Batterman for the information.)