Six Numeri for Honorius

[Robert Vermaat]

I've been thinking about the six military units sent from the east to reinforce Honorius at Ravenna in 409/10.
[..]
But which units were they? Looking at the eastern army lists in the Notitia Dignitatum, I see that there's a rather anomalous group of six auxilia palatina units under the Magister Militum per Illyricum: the Ascarii Seniores, Ascarii Iuniores, Petulantes Iuniores, Sagittarii Lecti, Invicti Iuniores and Atecotti.
Could these have been the 'six numeri' sent west to help Honorius? If so, what might have happened to them?

Looking at the western Notitia, there's an odd concordance in the list for the Comes Hispanias. His units include the Ascarii Seniores, Ascarii Iuniores, and something called the Invicti Iuniores Britones. Is this a coincidence? The shield designs are different, although the one given for the western Ascarii Iuniores does look quite similar to the one for the (eastern) Petulantes Iuniores - and there's no unit of that name in the west...
Could it be, perhaps, that the six eastern numeri formed the nucleus of the reconstructed western field army that Constantius III led into Gaul, and that the Comes Hispanias Asterius (presumably) led two or perhaps three of these units into Spain in 419 to reconquer it from the Vandals and Alans? (the eastern section of the ND would not, of course, have been updated after c.395, so the units would appear as duplicates).
Interestingly, however, the list for the Comes Hispanias also includes three units which appear to be among those named by Claudian as the force sent to Africa to defeat Gildo in AD398: the Sagittari Nervii, Felices Seniores and Invicti Seniores...
(P.s. I notice, looking through the notes for Cromwell's Rise and Decline of the Late Roman Field Army, that Dietrich Hoffman (in Das Spätrömische Bewegungsheer, 1969) made the same guess about the six auxilia from Illyricum!)

I think Hoffmann treated at least some of these units as new ones (such as the Invicti), paid for by the defeat of Gildo.
The eastern Notitia was of indeed out of date by 410, so it's difficult to compare both documents in that sense - we can't tell if these units actually moved from East to West.

I once read an article about a list of units in Spain, independent of the ND, the Epistula Honorii.
One of these two:
Sivan, HS. (1985); 'An unedited letter of the emperor Honorius to the Spanish soldiers', Zeitschrift für Papyrologie und Epigraphik, vol. 61, pp. 273—87.
Michael Kulikowski (1998); 'The Epistula Honorii, Again', Zeitschrift für Papyrologie und Epigraphik, vol. 122, pp. 247-252, link here

Anyway, the sending of those 4000 men as part of a post-Stilicho treaty is interesting enough. Payment for the death of a threat to Constantinople?