Family of Menas Kontoleon and Maria Kassimatis

I am looking for the Family of Menas Kontoleon who married Maria Kassimatis in Kythera. My Grand-Father John Kontoleon was born in Kythera 1n 1900 and came to Australia with his Uncle on a boat when he was thirteen. They settled in Brisbane.He had 2 Brothers and 2 Sisters. Their names were Nicholas,, William Zoe and Gloria.