Saovabhark Nariratana[1] (Thai: เสาวภาคย์นารีรัตน์; RTGS: Saowaphak Narirat), born Princess Piu Ladavalya (Thai: ปิ๋ว ลดาวัลย์; RTGS: Pio Ladawan; 26 January 1854 – 21 July 1887) was a consort of Chulalongkorn, the King of Siam.

She was a daughter of Ladavalya, Prince Bhumindra Bhakdi and Lady Chin.