Mike here are some of the abbreviations
DH dear husband
DW dear wife
DD dear daughter
DS dear son
SIL sister or son in law
DIL daughter in law
GD granddaughter
GS grandson
FIL father in law
MIL mother in law
Etc.
I think JB was Japanese Beetle
Hope this helps. I had to ask too. Now when it comes to the guys on here sometime I don't have a clue
Need more coffee!