LN Lane
LN Administrative Leave
LN Jamahirya Libyan Arab Airlines (IATA airline code)
LN Larry Niven (Author)
LN Lawful Neutral (gaming)
LN Lawrence North (High School)
LN League of Nations (predecessor to United Nations)
LN Learning Network (USACE)
LN Lega Nord (Italian: Northern League, political party)
LN Legalman (USN Rating)
LN Leinen
LN Leonard Nimoy (actor)
LN Level of Noise
LN LexisNexis (online legal research tool)
LN Liaison
LN Like New
LN Line Number
LN Liquid Nitrogen
LN Lithium Niobate
LN Little Nickel (newspaper, Washington)
NL Netherlands
nL Nanoliter
NL National Laboratory
NL National League (baseball)
NL Natural Language
NL Nesting Level
NL Netherbian Lair (Everquest)
NL Network Layer
NL Network Library
NL Neuvostoliitto (Finnish: Soviet Union)
NL New Latin
NL New Line
NL Newfoundland and Labrador
NL Nick Lachey (singer)
NL Night Light
NL Nightlight Studios (game developers)
NL NIMA Library
NL No License
NL No Limit
NL No-Load (mutual funds)
I personally felt that NL was more popular and immediately thought of The Netherlands (Holland) and the National League. Check out
http://www.acronymfinder.com for more