Named after the grandson Aleksandr (b. 1987) and two granddaughters Mariia (b. 1987) and Anna (b. 1985) of astronomer Klim Churyumov, co-discoverer of comet 67P, the main target of the Rosetta spacecraft.
Discovered on 10-9-2009 in ESA OGS by Busch, M., Kresken, R.