Please give the name of customers from the West region that bought exactly 8 items in their purchase.
name of customers refers to "Customer Name"; bought exactly 8 items refers to Quantity = 8
SELECT DISTINCT T2.`Customer Name` FROM west_superstore AS T1 INNER JOIN people AS T2 ON T1.`Customer ID` = T2.`Customer ID` WHERE T1.Quantity = 8 AND T1.Region = 'West'