Mishneh Torah — Transmission of the Oral Law מסירת תורה שבעל פה, Chapter 11

רַבַּן גַּמְלִיאֵל הַזָּקֵן קִבַּל מֵרַבַּן שִׁמְעוֹן אָבִיו, בְּנוֹ שֶׁלְּהִלֵּל; וְרַבַּן שִׁמְעוֹן בְּנוֹ קִבַּל מִמֶּנּוּ, וְרַבַּן גַּמְלִיאֵל בְּנוֹ קִבַּל מִמֶּנּוּ, וְרַבַּן שִׁמְעוֹן בְּנוֹ קִבַּל מִמֶּנּוּ. וְרִבִּי יְהוּדָה בְּנוֹ שֶׁלְּרַבַּן שִׁמְעוֹן, זֶה הוּא הַנִּקְרָא רַבֵּנוּ הַקָּדוֹשׁ, וְהוּא קִבַּל מֵאָבִיו, וּמֵרִבִּי אֶלְעָזָר בֶּן שַׁמּוּעַ וּמֵרִבִּי שִׁמְעוֹן חֲבֵרוֹ.

Rabban Gamliel the elder received the tradition from Rabban Shimon, his father - the son of Hillel the elder. Rabban Shimon, his son, received the tradition from him. Rabban Gamliel, his son, received the tradition from him and Rabban Shimon, his son, received the tradition from him.Rabbi Yehudah, the son of Rabban Shimon and referred to as Rabbenu Hakadosh ("our saintly teacher"), received the tradition from his father, from Rabbi Elazar ben Shamu'a, and from Rabban Shimon and his colleagues.