Rajan is a name of Hindu / Indian origin, and is commonly used for males.
According to the Food Network, 1/3 to 1/2 pound of potatoes should be allocated per person when preparing mashed potatoes. When serving roasted potatoes, 2 1/2 pounds of potatoes should be allocated per person.
After 20 years of growing, and now with full fertility, full irrigation and essentially a weed free field, we expect an average about 13 lbs of potatoes for every pound we plant (1.6 pounds per foot of row, or 28,000 lbs/acre). We have done much better, but in the first years of growing, much worse.