Andreas Venizelos is a fictional character in the Honorverse. He serves as Honor Harrington's tactical officer in On Basilisk Station and as her executive officer in The Honor of the Queen. Venizelos was promoted to captain of the starship Apollo, assigned to Home Fleet. Later, he served as Honor's Chief of Staff and was captured along with her by Lester Tourville. He helped her escape the Havenite prison ship PNS Tepes, but died in the attempt.