query-fontset

query-fontset is a built-in function in `C source code'.

(query-fontset PATTERN &optional REGEXPP)

Return the name of a fontset that matches PATTERN.
The value is nil if there is no matching fontset.
PATTERN can contain `*' or `?' as a wildcard
just as X font name matching algorithm allows.
If REGEXPP is non-nil, PATTERN is a regular expression.