Possible Clues:

• Adam is the first to arrive
• Heir to the throne, as a rule
• Like Marcia, among the "Brady Bunch" daughters
• First-born daughter detained by Spain, in order to prevent ...
• Meg, among the Marches
• Some cruel destiny for first-born
• Adam and Ray from steelyard
• Turns up, it's time to take notice around Donegal of the first to arrive
• Maid from Middle East is not the youngest
• The first issue for Adam