punctator

from The Century Dictionary.

• noun One who marks with dots: specifically applied to the Masorites, who invented the Hebrew vowel-points. See masoretic.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who marks with points. specifically, one who writes Hebrew with points; -- applied to a Masorite.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One who marks with points, especially in writing Hebrew.