Joannina

Anastasius was the son of Theodora’s daughter. He is only known to have been betrothed to Joannina, daughter of Belisarius & Antonina, and was not the husband of Juliana.

References

• The Imperial Families of Ancient Rome By Maxwell Craven. GoogleBooks Anastasius, senator in 548. Betrothed to Belisarius’ daughter by whom he had no issue.
• Alan Cameron. Duke University, Greek, Roman and Byzantine Studies The House of Anastasius. Columbia University, pp 259-276. June 1978. Page 270. Accessed 9 April 2020. https://grbs.library.duke.edu/article/viewFile/7451/4919 page 17 of PDF. Joannina, daughter of Belisarius & Antonina. Betrothed to Anastasius, son of (unnamed son of Probus) & (unnamed daughter of Theodora).
• The Secret History By Procopius GoogleBooks (chart), GoogleBooks (narrative)
• The History of the Decline and Fall of the Roman Empire, Volume 4 By Edward Gibbon. Page 294. GoogleBooks Joannina their daughter, and the sole heiress of their fortunes, was betrothed to Anastasius the grandson, or rather the nephew, of the empress", whose kind interposition forwarded the consummation of their youthful loves. But the power of Theodora expired, the parents of Joannina returned, and her honour, perhaps her happiness, were sacrificed to the revenge of an unfeeling mother, who dissolved the imperfect nuptials before they had been ratified by the ceremonies of the church"