Theodosios 4, known as Salibaras, was a patrikios and primiskrinios (Θεοδόσιον, πατρίκιον καὶ προμοσκρίνιον (sic), τὸ ἐπίκλην Σαλιβαρᾶν); after the mutiny at Serdika in 809 he was left with the troops by the emperor Nikephoros I (Nikephoros 8) to discover the identity of the ringleaders, who were subsequently flogged and exiled: Theoph. AM 6301. Promoskrinios (or primiskrinios) denotes either a dignity or a post. Since Theodosios 4 was a patrikios, it presumably denotes the latter, but the word seems otherwise unattested at this date. The scrinia had by this date been transformed, all or mostly, into sekreta, in connection with which the title primiskrinios is not recorded; cf. Bury, Admin. System., pp. 83-84, Oikonomides, Listes, pp. 309-310. Could the word have been revived by Nikephoros 8 for, e.g., the protoasekretis?

In 811 he is recorded as a patrikios and as a close and loyal attendant on the emperor, who warned Nikephoros 8 of their great unpopularity (ὑπό τινος γνησίου θεράποντος, Θεοδοσίου φημί, τοῦ Σαλιβαρᾶ πατρικίου ὄντος); the emperor allegedly gave an uncompromising reply, which is said to have been later reported directly to the chronographer Theophanes by Theodosios himself (see Mango and Scott, Theophanes, p. 676, n. 11 and p. lix); he accompanied the expedition which Nikephoros 8 led against the Bulgars and was among the leading persons (τῶν σὺν αὐτῷ μεγιστάνων) who were killed in the Roman defeat of 26 July when the emperor perished; he is here described as the man who was responsible for inflicting great harm and distress on the empress Eirene I (Eirene 1) (Θεοδόσιος πατρίκιος ὁ Σαλιβαρᾶς ὁ πολλὰ λυπήσας καὶ κακὰ ἐνδειξάμενος τῇ μακαρίᾳ Ἐιρήνῃ): Theoph. AM 6303.

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