This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of, relating to, or explaining a name or names.

adj. Of or relating to onomastics.

adj. of, or relating to a personal or place name

adj. of, or relating to onomastics

adj. Applied to a signature when the body of the instrument is in another's handwriting.

Of, pertaining to, or consisting of a name: specifically applied in law to the signature of an instrument the body of which is in the handwriting of another person, or to the instrument so signed.

adj. of or related to onomastics

"Once the purely linguistic approach has been abandoned, an opportunity has been provided for a new kind of onomastic vision which treats names as names and not just as words with peculiar properties."

onomastician   

anaplastic    bombastic    desmoplastic    drastic    dynastic