According to Saul Tigh in Battlestar Galactica: The Resistance, twenty billion people died in the attack of the Twelve Colonies; in "A Disquiet Follows My Soul", both Kara Thrace and Felix Gaeta put the number at fifty billion.
Felix Mendelssohn | Felix Frankfurter | Gaeta | Felix the Cat | Félix Guattari | María Félix | Félix Trinidad | Felix Klein | Julie Felix | Felix Rodriguez | Félix Houphouët-Boigny | Felix Da Housecat | José Félix Ribas Municipality, Aragua | John I of Gaeta | Felix von Luckner | Felix Unger | Félix Rodríguez (Central Intelligence Agency) | Felix Magath | Félix Fénéon | Allyson Felix | Felix Werder | Felix the Cat: The Movie | Félix Resurrección Hidalgo | Felix Dzerzhinsky | Felix da Housecat | Felix Cavaliere | Docibilis II of Gaeta | Rachel Félix | Leo II of Gaeta | Felix Silla |