ɡɹˈɛɡ dʒˈækɑːbsən bˈɔːɹn ˈɔːɡəst tˈuː, nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi nˈaɪn ɪz ɐn ɐmˈɛɹɪkən sˈɔŋɹaɪɾɚ hˌuː wʌzɐ fɹˈɛnd ænd sˈɔŋɹaɪɾɪŋ pˈɑːɹtnɚɹ ʌv dˈɛnɪs wˈɪlsən ʌvðə bˈiːtʃ bˈɔɪz, ænd ɐ pɹˌɑːsɪkjˈuːʃən wˈɪtnəs ɪnðə mˈɜːdɚ tɹˈaɪəlz ʌv mˈɛmbɚz ʌvðə mˈænsən fˈæmɪli.
Gregg Jakobson (born August 2, 1939) is an American songwriter who was a friend and songwriting partner of Dennis Wilson of the Beach Boys, and a prosecution witness in the murder trials of members of the Manson Family.