Anderson Lookup please

[TrueBlueAngel]

I'm trying to trace the family of my grandmother.  Her mother was Margaret White Anderson, b. in 1902 in Cumnock.  Her father was Douglas. b1865 (married Annie White), his father John Anderson b c1851 (Married Jane kennedy) and his father John Anderson b. c1830 (married Elisabeth Murray).  Apart from Margaret, I dont know where the others were born but guessing Cumnock.  Also the two Johns, their year of births are a guess.
Can anyone help?
Thanks
Sharon