crossbar cross stroke overlap ancient

Overlapping crossbars / extended crossbars

I'm looking into typefaces which have crossbars which overlap the rest of the letter, as seen in this example.
Is there a name for this particular feature?
Is there a period in history where this feature was seen a lot, and what (if any) was the reason behind it?
Is there any sort of reference to be found in ancient scripts / glyphs?

Any help much appreciated.