Hi Linda,
Erected by James McKinzie Cairnryan IMO his wife Mary Beggs who died 13th June 1847 aged 73 Years. Also his son James who died 1st January 1840 aged 28 years. Niven McKinzie born 12th Jany 1803, died 7th August 1852. Thomas McKinzie born 22nd Sept 1799, died 17th Jany 1854. William McKinzie born 2nd April 1801, died 25th Feby 1863. JamesMcKinzie born 8th Jany 1767, died 23 Octr 1866.
None of the other Beggs MI's match up with any of the others you gave. There were 2 Charles Murrays but neither married to a Janet Begg.
Hope this helps.
Terry