How are connotation and allusion connected?

Answer 1

You cannot say it definitely that these both are totally connected! However, if and the least, they are somewhere connected, that is only in the sense that they denote towards some other thing or some other idea than the words itself (or the phrases applied).

Answer 2

Connotation refers to the emotional or cultural associations a word carries, while allusion refers to a reference to another text or cultural symbol. Allusion can influence the connotations of a word by linking it to the implications of the referenced text or symbol. In this way, allusion can deepen the connotations of a word by connecting it to broader layers of meaning and cultural significance.