Emrys could maaaaaaybe work? He had a general rule against sleeping with UC debutantes SPECIFICALLY to avoid situations like this and he doesn't look much like your suggested face, but he was young enough in 1877 that mistakes could have been made, maybe. After having seen Trystan and Ambrosia in action for a few years he would have had no desire to get forced into a marriage - but his parents definitely would have forced him into one if they were aware, so we'd have to figure out a way for this all to have happened without anyone telling his dad. IDK, it might be too much of a stretch.

My other rakeish man of appropriate age, Oz, was abroad in '77.