15 baby names with a similar sound and feel to Costello.
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"mistress, lady of the house"
"from Obdul (place name or personal name)"
"blessed, fair, white"
"queen"
"act of conceiving, inception"
"hair of a comet"
"Noble; of noble kind. A variant of Adele and Adell, rooted in the O..."
"Carl's town, farmer's settlement"
"beam of light"
"brave counsel, bold advisor"
"modern invented name, possibly related to traveler"
"bear battle"
"linden tree valley"
"Possibly from Slavic volna meaning wave, or related to free will"
"wet, rain"