I've heard both.
I think it may be a regional thing. In DC, I'll hear jac-o-bee (Don't ask me to do the accents, I can never do that) more often that not. In the midwest, I hear jah-ko-bee.
Edited to elaborate

This message was edited 8/6/2006, 8:26 AM

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Messages

pronounciation of Jacoby  ·  ali  ·  8/3/2006, 2:43 AM
Re: pronounciation of Jacoby  ·  indigopearl  ·  8/3/2006, 10:20 AM
Re: pronounciation of Jacoby  ·  Agata  ·  8/3/2006, 2:59 AM
I know a family with this surname in Kentucky and they  ·  Eden  ·  8/5/2006, 9:56 PM
ja-KO-bee in South Africa  ·  Anneza  ·  8/3/2006, 5:44 AM
ditto, surname jah-KO-bee in TX  ·  Lillian  ·  8/3/2006, 4:13 AM
Re: pronounciation of Jacoby  ·  Chrisell  ·  8/3/2006, 3:59 AM
I've heard both.  ·  Siri  ·  8/6/2006, 8:07 AM
Re: pronounciation of Jacoby  ·  Lissy  ·  8/5/2006, 12:52 PM