Volmer's father was Hindrik and his mother was Mai. His paternal grandparents were Peeter and Ädu; his maternal grandparents are Hans and <Unknown>. He has two brothers and four sisters, named Märt, Juhan, Katri, Mari, Anu and Tiiu. He had three half-brothers and four half-sisters, named Jaan, Hans, Evert, Margret, Mai, Madli and Mari.