'Choujo.'
長男です。弟は四人。 chounandesu. otouto ha yonnin.
Tarō (太郎), a stand-alone Japanese given name or a common name suffix for males (literally "eldest son"). ------- : First Born Son is "Chou-Nan."  「長男」 : First Born Daughter is "Chou-Jo."  「長女」 : [PR] http://hm90017.angelfire.com/
The Cratchits' eldest daughter is Martha. She works as an apprentice at a milliner's shop.
The eldest Cratchit daughter in "A Christmas Carol" is Martha.
長男 /chou nan/ means 'first son, eldest son'.
Shakespeare's eldest daughter Susanna was born in May of 1583. She went on to marry a man called Dr. John Hall and have a daughter called Elizabeth.
kobe's eldest daughter
Elder if you have 2 daughters, eldest if more than 2.
in eastenders Tanya's eldest daughters is called Lauren branning
Henry the 8th
Khojen Beki - the eldest daughter of Genghis Khan
You can say it both ways.