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“NCIS” star Michael Weatherly, 45, and wife Bojana Jankovic welcomed a son named Liam on Oct. 29. The couple already have an 18-month-old daughter named Olivia, and Weatherly has a son named August from his previous marriage to Amelia Heinle.

WHAT IT MEANS:  Will, protection (Germanic), “my people” (Hebrew)

WHERE IT ORIGINATED: Liam is a short form of the classic Irish name William, but as a Hebrew name it also means “My people, I have a nation.”

POTENTIAL NICKNAMES: Liam is tough to shorten further, but we like the ring of “Lee Weatherly.”

KNOW THIS: Liam is growing in popularity in America, but it’s already huge in New Zealand and Australia and the Canadian provinces of Nova Scotia, Alberta and Columbia.

POP CULTURE CONNECTIONS: The name proudly belongs to Liam Neeson, a fine Irishman in his own right, and Liam Gallagher, the singer of the British rock band Oasis.