Can't match up those particular names to any MI in Glassford but I feel sure some of the Allans are yours!
Very briefly -
MI 21 is for Robert Allan, mason, accidently killed at Hamilton 1877 aged 69. His wife Isabella Hopkins died Canada 1900. Lots of children mentioned. Robert's youngest brother Andrew died Glasgow 1850 aged 36. Robert's eldest son, Robert, died Cambuslang 1914.
MI 22 Robert Allan, farmer in Heads erected this stone 1829.
MI 27 is for family of Patersons. Margaret Paterson died 1872 aged 50, wife of Robert Allan.
MI 29 is for Robert Allan who died 1907 aged 70, his wife Janet Coats Murdoch died 1894 aged 42. Their only son, Robert Hamilton died 1894 aged 6.
(Hamilton would have been his middle name, so probably named after grandfather or gt-g/father)
MI 200 (in the new cemetery) Isabella Hopkins Allan died 1936 aged 55. Her sister Jessie Allan died 1942 aged 65. Her brother Hugh died 1946 aged 63. Her brother Robert died 1948 aged 69.
MI 206 (new cemetery) Stephan Allan died 1945 aged 77, his wife Euphimia Rawson Stewart died 1943 aged 75.
Hope this helps a little.
Lodger