There are some adjectival surnames which are not immediately recognizable.
The yellow beak is long and curved, hence the adjectival "scimitar."
In huss, the German for goose, we may recognise the oose without its adjectival ‘g’.
They are formed by adding the adjectival suffix -a to the cardinals.
In the first place the crude form seric was neither Latin nor Greek, so that the -ic could not be adjectival.
They are essentially adjectives, and follow the adjectival rules as to the formation of the plural and the accusative.
The adjectival form has, as seen above, a tendency to make the vowel of the preceding syllable small: old, elder.
Apps is sometimes for asp, the tree now called by the adjectival name aspen (cf. linden).
In No. 19-1 word is adjectival in meaning, and can45 no more take a comma than can good in good man.
To interpret an adjectival nickname we must go to its meaning in Chaucer and his contemporaries.
Euphemistic substitute for an expletive adjective: You adjectival idiot! (1850+)