Often we can find two siblilngs with the same name. Sometimes they should NOT be merged.
Somewhere between 5% and 40% of families, (before 1900) when an infant dies, will use the name again, whether to honor the grandparent (or aunt/uncle) for whom the child was named, or to remember the infant who couldn't survive.
Just be aware when you have to children with the same name that have birth days two to five years apart that probably the first one died before the second was born, that they are not duplicates.
Just one more thing to worry about.