If you are working on a more recent relative and you’ve got a copy of their “funeral book,” look and see if the names of those who came to pay their respects are in the book.
It is a good way to get ideas of who might have been your ancestor’s associates and who was alive when your ancestor died. They may have even written in their city of residence.
Also remember that people tend to “go in together” and adjacent names in the book may be closely related to each other, members of the same family, etc. Don’t neglect the clues of who is a “paper neighbor” to who.
And there’s always their signatures…hopefully they are readable.