English Meaning: The name Cassandra is an English baby name. In English the meaning of the name Cassandra is: Cassandra was a Trojan prophetess, daughter of King Priam. This name became popular in medieval Britain, and fashionable in the USA in the mid-2Oth century.Greek Meaning: The name Cassandra is a Greek baby name.In Greek the meaning of the name Cassandra is: Unheeded prophetess. Cassandra was a Trojan prophetess, daughter of King Priam. In Homer's 'The Iliad' Cassandra's prediction of the fall of Troy was unheeded.reek Meaning: The name Cassandra is a Greek baby name. In Greek the meaning of the name Cassandra is: Unheeded prophetess. Cassandra was a Trojan prophetess, daughter of King Priam. In Homer's 'The Iliad' Cassandra's prediction of the fall of Troy was unheeded.