The eldest son of Rao Maldev, Rao Ram Rai was married to a daughter of Maharana Udai Singh of Mewar and had one child, Kunwar Kalla Singh who was a co-ruler of Sirohi.
therefore this Kunwar kalla singh also a grandson of Rao Maldev would either be Phool's brother or cousin.
Also Rao Chandrasen, son and successor of Rao Maldev had a daughter whose name remains unknown and she was married to Maharana Udai Singh of Mewar while her sister whose name also remains unknown was married to Akbar!