Rebbie Jackson, Michael's older sister and perhaps the lowest-profile Jackson sibling, is in mourning following the death of her husband, Nathaniel Brown.
Rebbie and Nathaniel wed in 1968 (!) and have three kids, Stacee, 40, Yashi, 35, and Austin, 27.
Jackson's son, Michael's nephew, posted on Twitter, "I love you Dad... Thank you for showing me unconditional love and the example of being a good person."
"Thank you all for the amazing love you have been giving me and my family."
Austin Brown also uploaded his parents' wedding photo, alongside a caption which reads, "44 years of marriage and inseparable till the end. Love u Dad."