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I have removed the citation needed annotation from "Joaquin ... is a derivation of the name of Saint Joachim." No citation is needed. This statement is not particular to Saint Joaquin. The names, 'Joaquin', 'Joachim', and 'Joaquim' are all forms of the same name in different languages.
'Joachim', of course, is not the name of Saint Joachim; that name was written with a different script and was pronounced differently. 'Joachim' is simply one of the several transliterations of the name into the Roman script, as are also 'Joaquin' and 'Joaquim'. The same name is also found in (at least) Arabic, Greek, and Russian (pronounced differently in each case, of course, and spelled with a different script in each case).