I know what "Jetters" means, but what does that have to do with Christianity?

hhp

Poetica by Robert Slimbach

Thanks

is THEODORE TWOMBLY also in Poetica?

Yes, I think so, there are upright (vertical) alternates for the uppercase and smallcaps glyphs (they are not in the default position though, so you will need an opentype savvy application to access them)