Sekeris was a direct descendant of Panagiotis Sekeris, a merchant and ship owner who lived in Constantinople in the early 19th century and co-founded the Filiki Eteria (a secret society aiming to overthrow the Ottoman rule in Greece), and who spent his entire wealth financing this process. Sekeris married Lioka (Kalliope), born Platsouka (passed away in 1997) and then Evi, born Protopappa. He was survived by one son, Evangelos a member of the Hellenic Diplomatic Corps, three grandchildren (Kalliope, Katherine and Constantine) and his three siblings, two brothers (Giorgos and Thanassis) and one sister (Kalliope).