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.
If you haven't been eating them because you're worried about them making you gain weight, this should ease your mind. Eating sweet potatoes can actually help you lose weight because they're relatively low in calories. One medium baked sweet potato (about 3/4 cup) is just 100 calories. If you compare that to a slice of equal-calorie whole wheat bread, this orange tuber offers the same amount of carbs and almost twice the amount of filling fiber at 3.7 grams.