Mystery abbreviations

[SmallTownGirl]

This is an extract from an 1778 US publication of British Army Officers.  Does anyone know what the abbreviations

L.I
A.D.D.
G

stand for after the names of particular officers, please?  I have a suspicion that G stands for Grenadier - because I found this https://royalleicestershireregiment.org.uk/entity/108472-miles-lawford?q= - but L.I. and A.D.D. baffle me.

Thanks
STG

[fiddlerslass]

L I could be light infantry

[ShaunJ]

This looks like the 1778 Army List, 17th Regiment of Foot page.

Is there no list of abbreviations?

[ShaunJ]

This original version doesn't have the abbreviations, and some of the names are slightly different:

[Andy J2022]

Deleted. Shaun had already posted the same information

[SmallTownGirl]

This original version doesn't have the abbreviations, and some of the names are slightly different:

Yes, it's from a particular 1778 edition published in Philadelphia by MacDonald & Cameron (apparently). 

I did wonder about Light Infantry for L.I., but still have no idea about A.D.D. except the A is in a larger font than the two Ds and maybe that's significant. 

PS : I can't help but think that Perkins Magra sounds rather more like a wild west outlaw than a British army officer 

[Jebber]

Perkins Macgrath not Magna.

[Andy J2022]

Just a pedantic point but it's not A.D.D. - it's ADD. In other word it's not three initials, but an abbreviation of a single word. L.I. on the other hand certainly could stand for light infantry, that is to say he commanded a company within the battalion which was equipped in the light role, as opposed to a grenadier company which had a different role.  If that is what is being referred to in the American list then I am still no wiser about what ADD might refer to.

[Andy J2022]

Perkins Macgrath not Magna.

Magra is the correct spelling. The clip which Shaun J posted above is taken from the official British list of officers published by J Millan of Whitehall, London. The American version which SmallTownGirl found is clearly copied from the British list (the Americans paid no attention to copyright in those days) and that's where the spelling error crept in.