Complex sentence: After independence from Spain, Mexican Governor of California Pio Pico re-named it "Rancho de la Nacion" (Ranch of the Nation) and granted it to his brother-in-law John (Don Juan) Forster in 1845.
Split into simpler sentences: After independence from Spain, the Mexican government re-named it "Rancho de la Nacion" (Ranch of the Nation). Governor Pio Pico granted Rancho de la Nación to his brother-in-law John (Don Juan) Forster in 1845.