<-- majored in Chinese history, studied Mandarin for 5 years.
Dede is not little brother, that's Didi.
Gege (pronounced like gerh gerh) = older brother
Didi (dee-dee) = younger brother
Jiejie (jee-air jee-air but said very fast so the r is almost unspoken) = older sister
Meimei (may-may) =...