If you're familiar with regular expressions, you can use the -regex option to limit the output to filenames that match a pattern. And similar to the -iname option, there is a corresponding -iregex option that ignores case in the pattern. For example:

Note that unlike many programs, find requires that the regex specified matches the entire path, not just a part of it. For that reason, specifying the leading and trailing .* is necessary; purely using xt would not be sufficient.