Wiktionary
secondborn
a. 1 born as the second child to parent or family. 2 second of a particular type to be born to a parent or family. n. The second child to be born to a parent or family.
Usage examples of "secondborn".
This was a lass of the Secondborn, one in whom the blood once spread throughout humanity by the long ago love of Elf and mortal had reawakened.
Although the secondborn de Burgh usually was eager to head an expedition, he did not immediately answer.