When John Walker Barr was born in 1787, in Salisbury, Rowan, North Carolina, United States, his father, Isaac Barr, was 16 and his mother, Margaret Walker, was 17. He married Agnes McCord on 22 May 1811, in Maury, Tennessee, United States. They were the parents of at least 4 sons and 2 daughters. He lived in Maury, Tennessee, United States in 1820. He died in October 1849, in Marion, Illinois, United States, at the age of 62.
Scottish (Glasgow) and northern Irish (Ulster): habitational name from any of various places in southwestern Scotland, in particular Ayrshire and Renfrewshire, named with Gaelic barr ‘height, hill’ or a Brittonic cognate of this.
English and Welsh: habitational name from Great Barr in Staffordshire. This is from Brittonic barro- ‘top, summit’, referring to Barr Beacon; there is evidence that this was known as la Bare in the 13th century.
English (of Norman origin): habitational name from Barre-en-Ouche in Eure, France, or perhaps from Barre-de-Semilly in Manche, France.