what word links these: high, mark, turning?

Questions

In 1398 Inigo---------- , Marques de Santillana, Spanish poet, born ?

In 1398 Inigo Lopez, Marques de---------- , Spanish poet, born ?

In 1631 ---------- Dryden, first poet laureate of England (Absalom and Achitophel), born ?

In 1631 John---------- , first poet laureate of England (Absalom and Achitophel), born ?

In 1646 ---------- Flamsteed, first astronomer royal of England, born ?