Should I use the name?

So my husband and I are pregnant with our third. We don't know the gender yet but were discussing names and came up with our top 2 picks for a boy and top 2 for a girl, they ALL end in N (this was just a coincidence). Of our 2 other kids, our oldest's name ends in an A and our second's name ends in an N also, so if we used any of these, our oldest would be left out. We want at least one more kid after this one and if we use an N name for this kid then we definitely wouldn't be able to use one of the other 3 names for baby #4. But we really love these names and even some of our other top picks (not top 2) also end in N. Should we use one or should we find something that ends in a different letter?