this might explain some multiple burials from deceasedonline
Other interments in a grave are most useful in finding additional members of the family, as purchased graves can hold members of the family related directly or by marriage. However, if the grave is un-purchased (sometimes known as a "common" grave, or historically as a "paupers grave") then it is unlikely that interments in the grave will be of relatives, as these graves were used for those that couldn't afford to purchase exclusive burial rights in a plot, and typically hold a larger number of interments than privately purchased graves. The information about whether a grave is purchased or not is not always available on the website, but if a grave contains a large number of interments, and/or if the family names of the deceased are all different, then it is probably un-purchased.
Additionally, on rare occasions, fixed term burial rights in graves may have been re-sold on expiry to unrelated persons, in which case the original remains should still be recorded as being in the grave.
