A few months ago, we agreed that apostrophes do not belong in plurals: To make a plural, generally you add an s or es. No apostrophe. The same rule applies when you are referring to a decade, say, the 1920s. It is absolutely fine to put a letter after a number without..

If you’re writing a family history, you’re ultimately going to index it, right? If you’ve ever consulted a printed genealogy in hopes of finding an ancestor . . . only not to find an index to help you, you’ll know the importance of creating an index for your own work.

..

A friend recently received a document from a cousin, outlining her family’s ancestry. It was quite long, she said, and mentioned a Mayflower ancestor — but she didn’t know how to interpret it. There were lots of numbers, some of them roman numerals.

My well-trained..

Can we agree on something? Can we agree not to form plurals with apostrophes?

Now this may not seem like a genealogical topic, but making plurals does come up in genealogy, because it comes up in all writing. And sometimes in family histories we need to make plurals of..