MurTHAYdes ('th' as in 'thin') if u want to speak it but written is the same,
vowels work different in spanish
Mer makes the first e sound like a U as in MURH, but the next E after the C becomes a TH giving the Thay, the last e is flat as in days (Murh)(thay)(days)
so even though its written the same the way to say it is
MurTHAYdes