18 baby names with a similar sound and feel to Kastiel.
You searched for names like
"creative combination name"
"God has remembered"
"king"
"reputation, legacy"
"descendant of little fawn"
"powerful (by association with the watt unit)"
"modern invented name"
"unit of luminous flux (scientific)"
"son of Jack, God is gracious"
"one who destroys evil (name of Shiva)"
"luminous, radiant"
"summoner, one who calls forth"
"ancient, enduring"
"red-haired"
"son of Stephen, one who wears the crown"
"quiet warrior, silent fighter"
"royal power"
"supplanter, held by the heel (via Jake/Jacob)"