Which preposition to use with cou

of Occurrences 1%

He had made a very good selection for those ladies,lace scarfs and rabats and little tours de cou of fur,really very pretty.

to Occurrences 1%

On quitting Paris, I had procured a letter of introduction from Count La Cou to Madame de Bellou, at Mortagne, a charming old lady of an ancient and noble family in that province, who had never quitted the seat of her ancestors, but remained quiet and respected during all the storms of the revolution.

Which preposition to use with  cou