Question: Who is the paternal grandfather of Euphemia Ii, Countess Of Ross?
Answer: Walter Leslie

Alexander Leslie, Earl of Ross (died 1402) was a Scottish nobleman. Born between 1367 and 1382, he was the son of Walter Leslie, Lord of Ross and Euphemia I, Countess of Ross. In around 1394 he became Earl of Ross and sometime before 1398 he married Isabel Stewart, daughter of Robert Stewart, Duke of Albany