English, Biblical:From the Hebrew name יוֹאֵל (Yo’el) meaning “YAHWEH is God”. Joel was a minor prophet in the Old Testament, the author of the Book of Joel. In England, it was first used as a Christian name after the Protestant Reformation. (behindthename.com)
nameberry.com- Parents a half-century ago tried to jazz up and formalize old standbyJoe by reviving this Old Testament prophet name, but at this point we’re back to basics and Joe sounds much more honest and straightforward.
Nicknames & Variations: Jole
International Variations: Jöel (French) Yoel (Hebrew)
Global popularity of Joel (babynamewizard.com)
- #5 in Switzerland (German)
- #52 in Spain
- #55 in Sweden
- #57 in Germany
- #66 in Australia (Victoria)
- #75 in Australia (New South Wales)
- #80 in England
- #100 in Canada (Alberta)
- #113 in United States
- #116 in Canada (British Columbia)
- #158 in Scotland
- #184 in Canada (Quebec)
- #236 in Norway
Known siblings:Aaden Aaron AlexanderAlexis Alice Ann BenjaminCollin Daniel EthanGabrielle Gemma HannahIsac James Jared JohnJonathan Joshua LeahMichael Noah PeterRebecca Seth (babynamewizard.com)
New Zealand Baby Names 
Sophia said,
February 1, 2010 @ 5:43 am
Siblings of Joels I know:
1) Kimberley, Harley (twin) and Mabel (half-sister)
2) Finnian (Finn), Ruby and Oliver
Um, that’s actually all I think. I thought I knew more haha
babynamelover said,
February 1, 2010 @ 5:55 am
Mabel is strange with Joel to me. Finnian, Ruby, Oliver & Joel is a cool sibset.
Sophia said,
February 1, 2010 @ 8:58 am
Yeah, on second thoughts I think Mabel might be the step-sister’s name and the half-sister is actually called Molly.
babynamelover said,
February 2, 2010 @ 5:11 am
I still don’t know how I feel about Molly does it age well? I feel the same about Ella!