They have acknowledged Martini's contribution in one Watchtower article.
The Watchtower 1950 12/1 has a letter that they wrote to the Catholic Church
" We do not say that “Jehovah” is the correct pronunciation of God’s name...But according to the Aramaic language which Christ and his apostles spoke, his name was pronounced “Yeshu′a” (the a representing a gutteral ending). .... . However, if you call it shallow scholarship for the Committee to use the word Jehovah in the New World Translation, then you will have to admit that it is due to the shallow scholarship of the Roman Catholic clergy of the thirteenth century, for in that century the word historically appears among them...But in its 2nd last paragraph the Translation Committee says: “While inclining to view the pronunciation ‘Yah·weh′’ as the more correct way, we have retained the form ‘Jehovah’ because of people’s familiarity with it since the 14th century"
Don't you just love the WTBTS? They are telling the Catholic Church that if they think they are bad scholars then this would make them the bad scholars.