Question: Who is the paternal grandfather of Donal Iv O'Donovan?
Sentence (from "Donal III O'Donovan"): From the inauguration of his father in 1584 to the date of his own accession to the chiefship in 1639, the O'Donovan family had risen to become one of the most prominent Gaelic families remaining in all the province of South Munster or Desmond, from a position of semi-obscurity in the mid-16th century, although this was in part due to the misfortunes and sad decline of several once more prominent families, as happens in all ages.
Relevant evidence: No