Dictionary.net

• Not another or other, used almost wholly in the plural, and by way of emphasis.

1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

• pron. Added after we ; us, by way of emphasis and chiefly in the plural ;— myself—used reciprocally in the regal or formal style.

1871 - The Cabinet Dictionary of the English Language