The Bosque River begins in Erath County and flows into the Brazos at Waco. The word “bosque” is Spanish for wooded, and that may be the source of the name. The river may have been named by the Spaniard Marquis de Aguayo in 1719, or for the despised French trader Juan Bosquet, who lived along the river among the Tawakoni Indians in the 1770s. Handbook of Texas