Escherichia coli

Etymology
Escherichia coli:

escherichia: "Escherich" (named after the discoverer of this bacteria, Theodor Escherich)

coli: "colon" (from latin coli, the genitive case of colon, meaning "belonging to the colon")

Explanation
The bacteria Escherichia coli was discovered by Mr. Escherich, and inhabits the colon (coli).

Synonyms
E. coli