The Imperial Palace's gates at which the Saeki clan had served was named "Saeki-mon" (Saeki Gate) after their surname, however, because Tang culture was the latest trend, Saeki-mon (佐伯門 pronounced as "safeki-mon" in those days and "safeki" was Japanese word) of Heian-kyu Palace which was built much later was changed to Soheki-mon (藻壁門 pronounced as "saufeki-mon" in those days and "saufeki" was the then Chinese pronunciation) which sound was very similar to Saeki-mon.
因みに警備を担当した宮門は、氏族名から「佐伯門」と名付けられたが、平安宮では唐風文化の影響から、「さへき」に音通する「藻壁門」と改められた。