Hi Jack
With regard to the other Blyths in Dysart, Dys 788 James McFarlane Blyth and Laura Blyth and Dys 272 James S Smith and Annie Blyth, are, I'm sure, mine too.
272   In Memory of Annie BLYTH died 4.2.1946 age 51
   wife of James S SMITH 
   Son Lindsay who was killed in Luheburg Germany
   26.4.1945 age 25
   husband of Jean J LUMSDEN 
   above James J SMITH died 17.3.1963
   Elizabeth R Sibbald
788   James McF BLYTH died 27.5.1960 age 65
   husband of Laura BLYTH who died 2.3.1977
Dys 443 William Blyth and Dys 1288 William Blyth may be mine because I've got a couple of Williams for whom I do not yet have spouses.  I'll check them out with SP   
443   William BLYTH husband of Nettie HUGHES
Died 4.2.1936 age 42
Daughter Julia died 25.12.1918 age 21
Etta Mable died 1.4.1936 age 1
Above Nettie HUGHES died 25.9.1940 age 44
1288   this stone is broken in half
   Erected by Margaret BLYTH in memory of her
   Father William BLYTH who died  6.12.1884 age 51
   Mother Janet ROBERTSON who died 16.10.1901 age 76
                Her sister Alsie
                Brother Andrew
                Can’t make the out the dates
IGI gives Father: William Blyth, Mother: Janet Robertson
Married 1854 Dysart 
 1. JANET BLYTH - International Genealogical Index 
Gender: Female Birth: 14 JUL 1860 Dysart, Fife, Scotland 
  2. ANDREW BLYTH - International Genealogical Index 
Gender: Male Birth: 12 OCT 1867 Dysart, Fife, Scotland 
  3. ALSIE BLYTH - International Genealogical Index 
Gender: Female Birth: 07 MAR 1865 Dysart, Fife, Scotland 
  4. MARGARET BLYTH - International Genealogical Index 
Gender: Female Birth: 21 SEP 1856 Dysart, Fife, Scotland 
  5. JAMES BLYTH - International Genealogical Index 
Gender: Male Birth: 27 APR 1874 Dysart, Fife, Scotland 
  6. HELEN BLYTH - International Genealogical Index 
Gender: Female Birth: 04 SEP 1862 Dysart, Fife, Scotland 
Glad to be of assistance one old man to another
If you wish photos send me a perssonal message for Email address
NorrieG