Great link for ideas like this one For sibling tattoos: Roman numerals. Could go with IV since there are four of us or each of us get the roman numeral for where we are in the sibling line up. 74 Of The Tiniest, Most Tasteful Tattoos Ever
The Armenian eternity sign is an ancient Armenian national symbol and a symbol of the national identity of the Armenian people. It is one of the most common symbols in Armenian architecture, carved on khachkars and on walls of churches.