Please also check out some of my other books:

For step-by-step, color illustrated tutorials on importing and exporting text and tables:

Abbreviations and Acronyms Found in Genealogy: J-K-L

As you consult this online appendix, keep in mind that the use of periods and capitalization may not be consistent in all sources. The abbreviations and acronyms are provided as a guideline only, not as a definitive reference. Also note that there are many abbreviations that can mean more than one thing; to avoid confusion or misinterpretation, it’s a good idea avoid using these in your citations.

Abbreviations & Acronyms Index:

Genealogy Terms: [A] [B] [C] [D] [E] [F] [G] [H] [I] [J-K-L] [M] [N] [O-P] [Q-R] [S] [T] [U-V-W-X-Y-Z] [Countries] 
[Irish Counties, by Chapman's Codes] [Census & Soundex]
[Miscellaneous Geography Terms] [Computer Terms]

Abbreviations & Acronyms: J

JA -- judge advocate
JGS -- Jewish Genealogical Society
JNH -- Journal of Negro History
jour. or jrnl. -- journal
JP -- justice of the peace
Jr. -- junior (as a title)
j.u. -- jure uxoris (right of wife)
jud or judic. -- judicial; judicious
jun. or junr. -- junior (refers to younger of two)
jur. or jurat. -- juramentum (certification that a document was written by the person who signed it)

Abbreviations & Acronyms: K

k.-- killed
K. -- king
K.B. -- Knight of the Bath
K.G. -- Knight of the Garter
k.i.a. or kia -- killed in action
kn. -- known
knt. or kt. -- knight
K.T. -- Knight of the Thistle

Abbreviations & Acronyms: L

l. -- license; law; lodger; line
la or labr. -- laborer
Lat. -- Latin
Lau -- launderer
lb. -- pound
LBC -- letter book copy
LC -- Library of Congress
ld. -- land
ldr. -- leader
LDS -- Latter-day Saints (The Church of Jesus Christ of Latter-day Saints)
l.e. -- local elder (in a church)
lib. -- library
lic. -- license
lieut. -- lieutenant
li. or liv. -- lived; living
liv. abt. -- lived about
ll. -- lines
lnd. land
loc. cit. -- loco citato (in the place cited)
l.p. -- local preacher
LSASE -- long self-addressed, stamped envelope (that is, #10 envelope)
Lt. -- lieutenant
ltd. -- limited

Abbreviations & Acronyms Index:

Genealogy Terms: [A] [B] [C] [D] [E] [F] [G] [H] [I] [J-K-L] [M] [N] [O-P] [Q-R] [S] [T] [U-V-W-X-Y-Z] [Countries] 
[Irish Counties, by Chapman's Codes] [Census & Soundex]
[Miscellaneous Geography Terms] [Computer Terms]