Where does “salutnomo” come from?

salutnomo (Esperanto) comes from Esperanto nomo, from French nom, from Old French nom, from Latin nōmen, from Latin est, from Proto-Indo-European h₁ésti, from Proto-Indo-European h₁es- — to be.

salutnomo (Esperanto): login name, username

Definitions

Ancestry of “salutnomo”, step by step

salutnomo traces back through two separate lines of ancestry.

via Esperanto nomo

Step	Language	Word	Meaning
1	Esperanto	nomo	name
2	French	nom	A name, "especially" a last name or family name;...
3	Old French	nom	name
4	Latin	nōmen	name
5	Latin	est	third-person singular present active indicative...
6	Proto-Indo-European	h₁ésti	to be
7	Proto-Indo-European	h₁es-	to be

via Esperanto saluti

Step	Language	Word	Meaning
1	Esperanto	saluti	to greet; to log in
2	Latin	salūtō	to preserve, keep safe
3	Latin	-ō	suffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
4	Proto-Indo-European	-ō	Derives nouns from roots

Every word from Proto-Indo-European h₁es- →Every word from Proto-Indo-European h₁ésti →Every word from Latin est →