NameQ
Details

- You can test for classes of symbol names using abbreviated string patterns with metacharacters such as *, as specified in "Some General Notations and Conventions".
Examples
Basic Examples (2)
Test whether a string corresponds to a Symbol:
Test whether there are any symbols corresponding to a class of strings:
Wolfram Research (1988), NameQ, Wolfram Language function, https://reference.wolfram.com/language/ref/NameQ.html.
Text
Wolfram Research (1988), NameQ, Wolfram Language function, https://reference.wolfram.com/language/ref/NameQ.html.
BibTeX
BibLaTeX
CMS
Wolfram Language. 1988. "NameQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NameQ.html.
APA
Wolfram Language. (1988). NameQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NameQ.html