Kammala wannan jumla: An haifi Francisco Javier Arana Castro a ranar 3 ga Disamba, 1905 a Villa Canales, Guatemala. Iyayensa, Ángel María Arana da Margarita Castro, sun fito ne daga dangin talakawa. Yana da duka biyun
Mutanen Espanya da 'yan asalin ƙasar, kuma wannan halin na ƙarshe ya fi fice a gani. Ba shi da ilimi na yau da kullun, amma ya kasance mai karantawa sosai, kuma abokan zamaninsa sun bayyana shi a matsayin mai wayo da hankali, kuma a matsayin mutum mai hazaka da farin ciki. An bayyana shi a matsayin mai magana da jama'a mara kyau, amma a matsayin mutum mai rinjaye a cikin tattaunawa ta sirri. A cikin 1946, yayin Juyin Juya Halin Guatemala, wani ma'aikaci a ofishin jakadancin Amurka ya bayyana siyasarsa a matsayin na kishin kasa, tare da kasancewa ɗan ɗan Amurka.