Reference for Gittin 71:6

רב יוסף אמר אפי' תימא לר' מאיר התקינו שיהא עדים מפרשין שמותיהן בגיטין מפני תיקון העולם

[and what] they ordained was that the witnesses should subscribe their names in full,<span class="x" onmousemove="('comment',' I.e., their name and that of their father, e.g., Reuben ben Jacob, and not merely their own name, which would be sufficient from the point of view of the Torah. [V. Strashun and cf. following note]. ');">⁵</span>

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