Split spanish full name in different fields

split_spanish_names.py

def separate_name_surnames(full_name):
    # Creamos una copia del nombre reemplazando todas las partículas
    modified_name = full_name.lower()
    particles = ["de la ", "de los ", "de las ", "del ", "de "]
    for particle in particles:
        modified_name = modified_name.replace(" " + particle, " " + particle.replace(" ", "_"))
    
    # Dividimos el nombre modificado
    parts = modified_name.split()
    
    # Contamos cuántas partes tiene el último "apellido"
    last_surname_parts = len(parts[-1].split('_'))
    
    # Si solo hay un apellido
    if len(parts) == 2 or (len(parts) == 3 and last_surname_parts > 1):
        first_name = ' '.join(full_name.split()[:-1])
        surname1 = full_name.split()[-1]
        return {'first_name': first_name, 'surname1': surname1, 'surname2': None}
    
    # Si hay dos apellidos
    surname2 = ' '.join(full_name.split()[-last_surname_parts:])
    remaining = ' '.join(full_name.split()[:-last_surname_parts])
    
    # Contamos cuántas partes tiene el primer apellido
    first_surname_parts = len(parts[-2].split('_'))
    
    surname1 = ' '.join(remaining.split()[-first_surname_parts:])
    first_name = ' '.join(remaining.split()[:-first_surname_parts])
    
    return {'first_name': first_name, 'surname1': surname1, 'surname2': surname2}

examples = [
    "Juan Antonio Conde Pérez",
    "María de la Cruz Martínez",
    "Juan de los Ríos García",
    "Peter O'Connor",
    "Pedro Sánchez de la Vega Martínez",
    "María José Gómez Pérez",
    "José María de la Cruz Sánchez",
    "Antonia Rosa Isabel Rodriguez De Los Monteros"
]

for name in examples:
    print(separate_name_surnames(name))