Wiktionary
phr. (context Northern England idiomatic English) Used at the end of a sentence to add emphasis.
Usage examples of "though but".
One of these seats was at present occupied by Cedric the Saxon, who, though but in rank a Thane, or, as the Normans called him, a Franklin felt at the delay of his evening meal an irritable impatience which might have become an alderman, whether of ancient or of modern times.
The reception of the athletes is even more demonstrative, for there is not a man in the assemblage who has not something in wager upon them, though but a mite or farthing.
Therefore it seems that, though but a boy, you may be considered to have a man's strength, for your father regarded Sandy as one of the stoutest and most skilful of his men-at-arms.
They are all Scotch gentlemen, and though but lukewarm in the cause of their country, there is no fear that any will be base enough to betray me.
Imagine Abraham, almost six feet high, though but fifteen years of age, homely as he could well be, clumsy and gawky in his appearance, clad in pioneer style, with legs and arms out of all proportion to his head and body, going through this ordeal of refinement!
Another axe, similar in size and form, was reared against the wall, and near it stood a two-handed sword, sometimes, though but rarely, employed in capital punishments.
My present name, though but slightly changed from my mother's, is not, as you will remember, my own.