Question

What is the convention for the same name being used for an younger sibling following the early death of the older child?

Answer 1

You give each child the name he or she was born with, and no numbers or other additions to the names (unless the person actually used such a thing).  Their dates of birth distinguish them.  It's also wise to add explanations in their biographies.

Comments

As Herbert says - no numbers etc unless they were used at the time.  (In some places "the younger" and "the elder" may be appended, but that can also be confusing when the same terms are used for parents and children who have the same name.)

You can also place a warning, such as the one I use here, or (I believe I saw someone say the other day) set up a rejected merge.

Whichever method you decide to use, be sure to have documentation and as full an explanation as you can in the biography.

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Thanks for the star, Rubén!

Great tip, Melanie, to create a rejected merge. 

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In the biography,  I usually use a phrase  like "second child of this name in the family.   The first had died  in (date)."  I have seen families with 3 or more deceased children of the same name.

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I have a pair in my family, one already deceased and the younger one is still living. I have photos of the younger one and his wife.