Citadel, fortress, or enclosure
Keilah is a biblical place name referring to a fortified city in the lowlands of Judah. It is famously known as the site where David saved the inhabitants from the Philistines. In Hebrew, the name implies a sense of security and strength through its association with a walled or protected space.
Less common today
Keilah isn't in the latest US Top 1000. It last peaked at #2,321 in 1997.
US births per 5-year period, 1990βpresent (SSA data).