Asteroid 9479, Madresplazamayo, was discovered on September 26, 1960 by CJ van Houten, Ingrid van Houten-Groeneveld, and Tom Gehrels at Palomar Mountain Observatory near Pauma Valley, California in the course of the Palomar-Leiden Survey. It has a period of 4 years, 87 days.
It was named after the Argentinian human rights organization Madres de Plaza de Mayo (Mothers of the Plaza de Mayo), which started as a group of mothers of liberal activists who were abducted and murdered by the mid-1970s to mid-1980s military regime in the era known as The Dirty War. They would hold demonstrations in Buenos Aires' Plaza de Mayo outside Argentina's presidential palace demanding to know the fate of their children.
Mothers of the Plaza de Mayo holding a demonstration
The meaning of asteroid Madresplazamayo seems to be: protest, abduction and disappearance, "where is my loved one?"