Son of Rav Safra
Rav Safra's son also known as Bireyh dRav Safra is mentioned in the Zohar, Parashas Terumah. He was born due to a blessing given to his father by Rabbi Shimon bar Yochi. Rav Safra passed away before his son was born. Eventually the son of Rav Safra made Aliyah from Bavel to Eretz Yisroel.
Kever Biray dRav Safra
The son of Rav Safra is buried in the industrial section of Safed right behind the generator field of the electric company. Although the location of his Kever is described in the Kitvay Ari, in recent times it was only rediscover by Yisroel Meir Gabbi and Ohali Tzadikim.