Octobrius

• Octubrius, Octombrius

From Octōber, with the ending modified to -ius, which seems to have been introduced by analogy from the names of the other months, such as Iānuārius, Mārtius, Iūlius, etc. Compare Septembrius, Novembrius, Decembrius. These innovative forms in -brius for Classical Latin -ber are rarely attested in antique written Latin (there is an example of Decembrius in the 6th century^[1]), but Kramer 1983 argues that it is likely the earlier-attested Koine Greek Σεπτέμβριος (Septémbrios), Ὀκτώβριος (Oktṓbrios), Νοέμβριος (Noémbrios), Δεκέμβριος (Dekémbrios) were taken from popular Latin spoken forms in -ius, rather than having their endings independently remodeled in Greek.^[2] Month names in -brius are attested in writing from Medieval Latin onwards, sometimes in texts that may have drawn on Eastern sources (such as the Laterculus Malalianus, based in part on the Χρονογραφία (Khronographía) of John Malalas).

• (Classical Latin) IPA^(key): /okˈtoː.bri.us/,
• (modern Italianate Ecclesiastical) IPA^(key): /okˈto.bri.us/,

Octōbrius (feminine Octōbria, neuter Octōbrium); first/second-declension adjective

1. (Medieval Latin) Alternative form of Octōber (“of October”)
   • 7th century-early 8th century, Laterculus Malalianus 8:^[3][4]

     Augustus vero Caesar LVI anno regni sui mense Octubrio qui et Perbereteo secundum Athineos dicitur, habiit in Capitolium, quod est in medium orbis Romae, ut per divinationem addisceret quis regnaturus fuisset post ipsum in Romanam rempublicem.

First/second-declension adjective.

Octōbrius m sg (genitive Octōbriī); second declension

1. (Medieval Latin) Alternative form of Octōber (“October”)

Second-declension noun, singular only.

• “octōbrius” in volume 9, part 2, column 431, line 30 in the Thesaurus Linguae Latinae (TLL Open Access), Berlin (formerly Leipzig): De Gruyter (formerly Teubner), 1900–present