He is the deck lieutenant in Star Wars: The Empire Strikes Back. He is the person who says, "Still no contact from Skywalker or Solo."
There is no widely known public figure or historical figure by the name Cal Alder. It's possible that Cal Alder is a fictional character or a private individual not known to the general public.
Alder is a noun.
Peyton Alder
Sadly, alder.
Yes, Alder is a hardwood.
Alan Alder was born in 1937.
Christopher Alder was born in 1960.
Christopher Alder died in 1998.
Joshua Alder was born in 1792.
Alder Valley was created in 1972.
Hotel Alder was created in 1910.
Jim Alder was born in 1940.
Berni Alder was born in 1925.