geez, quick responses, thanks guys!!
BJ - lot of good stuff (can I have those greek and cirillic in English

o

)
So far I have....(I dont know if some of the ones I found are only used in a modern context or not though)
HAB: Austria = Osterreich
WLS: Wales = Cymru
SCO: Scotland = Alba
POL: Poland = Polska
SPA: Spain = España
NIP: Nippon = Nihon
KOR: Korea = Choson
VEN: Venice = Venezia
GEN: Genoa = Genova
SWE: Sweden = Sverige
FIN: Finland = Suomi
CHE: Cherokee = Tsalagihi Ayili
OHI: Iroquois = Haudenosaunee
HUR: Huron = Wendat
SHA: Shawnee = Shawano
DEL: Lenape = Lenape
APA: Navaho = Dineh
HEL: Switzerland = Confoederatio Helvetica (Schweiz)
ALB: Albania = Shqiperia (or Shqiperise?)
BOS: Bosnia = Bosna
LAP: Argentina = Argentina
BRZ: Brazil = Brazil
BUL: Bulgaria = България (Bulgariya?)
QUE: Canada = Canada
CRO: Croatia = Hrvatska
CYP: Cyprus = Κύπρος (Kibris - greek, Chypre - French more accurate)
DAN: Denmark = Danmark
FRA: France = France
HEI: Germany = Deutschland (or Deutsches Reich or Heiliges Romanisches Reich)
GRE: Greece = Ελλάδα (Elliniki, Hellas, Ellada or Ellas)
HUN: Hungary = Magyarország
EIR: Ireland = Éire
ITA: Italy = Italia
LIT: Lithuania = Lietuva
LUX: Luxembourg = Luxembourg, Luxemburg
NOR: Norway = Norge
POR: Portugal = Portugal
SER: Serbia = Srbija (or Srbja)
HOL: The Netherlands = Nederland (or Koninkrijk der Nederlanden)
TUR: Turkey = Türkiye (Ottomans = Devlet-i Ali Osman)
UKR: Ukraine = Україна (Ukrayina?)
FLA: Flandern = Vlaanderen
FRI: Friesland = Fryslan
GEL: Gelre = Gelre
others I found...
PAP: Papal States = Stato della Citta del Vaticano!!! (or Patrimonium Sancti Petri)
MOR: Morocco = Al Maghreb al-Aqsa
IRA: Iraq = Uruk!!!
PER: Persia = Iran
HAI: Haiti = Hayiti
ALG: Algeria = Al Jazair
RUS: Russia = Rossiya
PRU: Prussia = Preußen (Preussen)
GEO: Georgia = Sak'art'velo (!!)
ETH: Ethiopia = Ityop'iya
MAM: Eqypt (rather than mamlukes) = Misr al-Arabiyah
CHI: China = Zhong Guo
OMA: Oman = Sultanat Uman
CAM: Cambodia = Kampuchea
MOL: Moldovia = Moldova
BYZ: Byzantium = Basilea Rhomanoi (Basileia Rhomaion)
DAI: Dai Viet = Dai Viet
CAS: Castille = Castilla y León
ARG: Aragon = Aragón
CAT: Catalonia = Catalunya
GRA: Granada = Gharnata
Again, thanks for the input, some surprising ones there. If any-one has any more they would like to share?
yours
Ayeshteni