Randolph Spudmore is the innovative designer of the popular Firebolt broom.
Randolph, a variant of Randulf (Randolf), is derived from the Germanic elements rand, meaning "rim (of a shield)", and wulf, meaning "wolf". It was brought to England via the Normans as Randúlfr (Behind the Name).
A spud is British slang for a potato.
Lexicon list of Broom Manufacturers
From the Web
Writing by J K Rowling: Firebolt
Pottermore feature: Broomsticks
Harry Potter Wiki: Randolph Spudmore