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Mario García Menocal died on 1941-09-07.
Mario García Menocal was born on 1866-12-17.
If you mean Mario Garcia Menocal (Ernest Hemingway's close cuban friend) then yes, he did have grandchildren. Two of them live in Miami, US and one lives in Mexico city (children of Pedro Garcia Menocal)
The population of Wielki Garc is 325.
The population of Mały Garc is 216.