come into vs come by

come into and come by both are verbs.

Word	Noun	Adjective	Verb	Adverb
come into	No	No	Yes	No
come by	No	No	Yes	No

As verbs, come into and come by are synonyms defined as:

come into (verb)	come by (verb)
obtain, especially accidentally	obtain, especially accidentally
	visit informally and spontaneously