|(L-R) Jack Kerouac, Caroline (Nin) Kerouac, Gabrielle Kerouac, Leo Kerouac, Bill Cannastra
Today's date in Kerouac history is a "two-fer." Jack's mom, Gabrielle (Mémère) died on this date -- October 12 -- in 1973, and early Beat scene member Bill Cannastra died on this date in 1950.
Mémère was an omnipresent and potent force in Jack's life. He lived with her off and on throughout his life, and thus she often was the anchor for his footloose wanderings. That is, he always had a home to which he could return. Jack made a deathbed promise to his father that he'd look after Mémère, and in his own way he did that right up until his death in 1969. She was a strong influence on his Catholicism. Gabrielle Kerouac appeared in a number of Kerouac's works: Angie in Vanity of Duluoz and Desolation Angels; Ma in Book of Dreams; Angy in Maggie Cassidy; Angy Duluoz in Doctor Sax; Ange Duluoz in Visions of Gerard; Marguerite Martin in The Town and the City; and Sal's aunt in On The Road.
Bill Cannastra died young and in a tragic manner, which you can read about here. More about Bill's life is accessible here. He appeared in Kerouac's works as follows: Finistra in Visions of Cody; Cannastra Finistra in Book of Dreams; and (probably) Charley Krasner in The Subterraneans.