Which preposition to use with lothaire

at Occurrences 2%

Several insurrections burst out in the empire; the first amongst the Basques of Aquitaine; the next in Italy, where Bernard, son of Pepin, having, after his father's death, become king in 812, with the consent of his grandfather Charlemagne, could not quietly see his kingdom pass into the hands of his cousin Lothaire at the orders of his uncle Louis.

to Occurrences 2%

From the accession of King Lothaire to that of Louis VI.

Which preposition to use with  lothaire