Warning! Spoilers for Outlander season 7, episode 14 ahead!A character called Percy Beauchamp was introduced in Outlander season 7, episode 14, and it’s pretty clear that he has an intimate connection with Lord John Grey. The man serves as an aide de camp for the Marquis de Lafayette and was, therefore, present at the dinner hosted by Jamie and Claire for George Washington. At first, Percy seemed to be of minimal importance, but the significance of his character shifted when he appeared later in Outlander season 7, episode 14, to warn Lord John Grey that his son William was in danger. Their private moment together clearly indicated a history.

https://screenrant.com/outlander-percy-beauchamp-wainwright-lord-john-explained/