One with the same birthday as seven siblings

• One of eight
• One of eight in a massive birth
• Certain baby
• Exceedingly rare infant
• Any of Apu's children, on "The Simpsons"
• One in eight finished lease after month
• Part of big issue to be raised in old court - increased rent
• Group arriving together in hotel put cost up
• Extra-special delivery?

Wiktionary Word definitions in Wiktionary
n. one of a group of eight babies born from the same mother during the same birth.