If you look in SHulchan Oruch, EH Hilchos Gittin, the Beis Shmuel brings a long list of names. Among them is the name Menucha and Simcha for women. How are these different then Shira?
He also has a list of Clalim. The very first one is that we do not change any name, evenm if it has a meaning which is a rayusa (negative connotation) or is the name of non-Jews.
Among the list of names is one which he says has no meaning whatsoever (some badly corrupted word), (I think in the letter Mem list), but is still a valid name, and should be left as is.