The Roman Map of Britain Londinium Augusta London

Londinium Augusti (R&C 97) next
Londiniou Londinii, gen. (Ptolemy I 15 7)
Londinion Londinium (Ptolemy II 3 12) a polis of the Cantii
Londinio (AI 4715 Iter II)
a Londinio (AI 4731 Iter III)
a Londinio (AI 4736 Iter iv)
a Londinio (AI 4741 Iter v)
a Londinio (AI 4767 Iter vi)
Lundinio (AI 47710 Iter vii)
Londinio (AI 4785 Iter vii)
Londinio (AI 4786, 4799 Iter viii)
Lundinio (AI 47911 Iter ix)
Lundinio vars. Lindinio, Londinio (AI 4808 Iter ix)
Londinium (Tacitus Annals xiv 33)
Londinio (TV 154.9)
Londini (TV 310.back 22)
Oppidum Londiniense (Panegyric viii 17 1)

Civitate Londinensi (Council of Arles)
Lundinium (Ammianus Marcelinus xx 1 3)
ad Lundinium, vetus oppidum quod Augustam posteritas appellavit (Ammianus Marcelinus xxvii 8 7)
ab Augusta profectus, quam veteres appellavere Lundinium (Ammianus Marcelinus xxviii 3 1)

Lindonion Lindonium (Stephanus of Byzantium citing Marcian's Periplus)
LON, LN, L (London mint-mark)
AVG (London mint-mark, coins of 4th century)
Londini ad fanum Isidis (JRS xii (1922) 283 graffito on a 2nd c jug)
Londinio (JRS xliv (1954) 108 address on wooden tablet)
Londinio (JRS l (1960) 108-111 tablet)


    RIB 19, on an early third-century tombstone of a speculator of Leg. II Augusta, taken to be a member of the governor's staff in London.
    [Dis Mani]bus / [Vale]r(ius) L(uci) f(ilius) C[l(audia)] Celsu[s] / [3 s]pec(ulator) leg(ionis) [II A]ug(ustae) An/[to]n(ius) Dardanus Cu[r]/[sor R]ubrius Pudens / [3]s Probus sp[e]c(ulatores) l[eg(ionis) / [

    The Ravenna Cosmography's records Caerleon as Isca Augusta (R&C 52), Chester as Deva Victris (R&C 86), and London as Londinium Augusti (R&C 97). Augusti, properly Augusta, may simply indicate the source of the local contingent - Leg. II Augusta. If so, the honorific title is that of the legion - not the city.

London (TQ3281)

Additional records of Leg II Augusta at London:
RIB 3 Ulpi/us / Silva/nus fac/tus Arau/sione emeri/tus leg(ionis) / II Aug(ustae) /votum / solvit
RIB 17 D(is) M(anibus) / Vivio Marci/ano |(centurioni) leg(ionis) II / Aug(ustae) Ianuaria / Martina coniunx / pientissima posu/it memoriam

See Frere (1987) p 199 for the view that the city was renamed coincident with Constantinius' elevation  from Caesar to Augustus.