Adrian,
A very nice listing. Well done for compiling. A couple of comments -
1 ROYAL ABERDEEN 18 6624 70 1780 Archie Simpson - main course heavily revised in the 1920's by James Braid - at the same site there's also the 18-hole Silverburn course, although that is also part of Aberdeen Ladies GC
2 CRUDEN BAY 18 6395 70 1899 Tom Simpson - plus the 9-hole St Olaf course - not sure who laid that out but holes 6-7-8 are great
6 NEWMACHER HAWKSHILL 36 6659 72 1989 Dave Thomas - there is also a second 18-hole course, the Swailend, laid out in the late 1990's, again by Dave Thomas
14 NEWBURGH-ON-YTHAN 18 6162 71 1888 - extended from 9-holes to 18-holes in the 1990's, not sure of the GCA
20 OLDMELDRUM 18 5988 70 1885 - extended from 9-holes to 18-holes in the 1990's, not sure of the GCA
26 KINTORE 18 6019 69 1911 - extended from 9-holes to 18-holes in the 1990's, not sure of the GCA
38 HAZLEHEAD 45 5673m 70 1927 - the original MacKenzie course
39 HAZLEHEAD 2 45 5303m 68 1927 - I believe this course was a Neil Coles/Brian Huggett course laid out in the 1970's - there is also a 9-hole course, not sure from when it dates or who laid it out
41 ABOYNE 18 5910 68 1883 - extended from 9-holes to 18-holes in the late 1980's, not sure of the GCA
East Aberdeenshire GC, west of the A92 at Balmedie - came and went in the late 1990's-2000's
Incidentally, there was once a course at Colliestone - just south of the village of the same name during the early part of the 20th century.
All the best