What should I call it? HTML::Entity-Reference? But does the dash cause problems?

If one does:

use HTML::Entity-Reference;
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this is equivalent to:

BEGIN {
    require HTML::Entity;
    HTML::Entity->import("-Reference");
}
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CamelCase is the usual convention when having module names composed of multiple words:

package HTML::EntityReference;
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An underscore works as well:

package HTML::Entity_Reference;
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