This memorial has the same birth and death dates as Thomas Downend who was the father of Mary Elizabeth who married Fay Gibbs.
It is unclear why this was found on a cemetery list as the stone with Thomas Downend's name and dates is clearly marked "Downend". Fay Gibbs' stone does not have a first name so "Unknown Gibbs" could easily refer to his stone but the dates do not match. It may have been a transcription error where two stones were conflated.
This memorial will be left on this site to help allay any further confusion when cemetery lists are consulted.