The "Practical English Usage", by Michael Swan, an OUP book gives following brief answer:
3 Suffixes that form nouns or adjectives
-(i)an-supporter of, language of-(Examples-Darwinian, republican)
nouns-citizen of-(Examples-Parisian, Moroccan.)
Posted by Donal Munro
Well, a librarian is someone who works in or keeps a library. Just because you belong to or are a member of the library it doesn't make you a librarian. You have to work there.
The suffix "-ian" has a lot of meanings, so many that it would be hard to list them. You've heard the joke, "If a vegetarian eats vegetables, what does a humanitarian eat?" You might as well ask, "If librarian means someone who works in a library, what does ovarian mean?"
While hard to find, There are a couple words that end in IAN. Such as Christian, comedian, and historian.
It comes from the Celtic/Gaelic meaning, God is gracious.
The suffix -ian in reference to a person means that the person specializes in something. In the case of a librarian, it would mean that the person specializes in library science.
The suffix is -ian.
Pedestrian does not have a prefix. The suffix is -ian. The root word is ped.
A suffix is an ending. The suffixes "an" and "ian" mean of, or belonging to. An example of a suffix meaning belong to is Italian, meaning belonging to Italy.
"ian' is not a prefix. A prefix is at the start of a word.
It's not a real suffix, you know. The real suffix is "ian" meaning a person from or connected to a place or activity or party. An Egyptian is a person from Egypt (Egypt+ian). A Christian is a person who follows the religion of Christ (Christ+ian). A musician is someone who plays music (music+ian). Probably the most widely used of these words is politician (politic+ian). By analogy to this word, people divided the word wrong as polit+ician, and treated -ician as a suffix in such relatively new words as mortician (mort+ician), or beautician (beaut(y)+ician). Similar misdivisions have created the suffix -aholic, as in "shopaholic" from a misdivision of alcoholic as alc+oholic rather than the correct alcohol+ic.
The suffix of the word "magician" is -ian.
The suffix is -ian.
Pedestrian does not have a prefix. The suffix is -ian. The root word is ped.
pilotion gayuistian (real word look it up)
A suffix is an ending. The suffixes "an" and "ian" mean of, or belonging to. An example of a suffix meaning belong to is Italian, meaning belonging to Italy.
physician, electrician,Mathematician, librarian
ian
The suffix "-ian" typically denotes belonging to or relating to a particular place, group, or characteristic. For example, "Canadian" refers to someone from Canada, and "musician" refers to someone involved in music.
of or relating to
"ian' is not a prefix. A prefix is at the start of a word.
It's not a real suffix, you know. The real suffix is "ian" meaning a person from or connected to a place or activity or party. An Egyptian is a person from Egypt (Egypt+ian). A Christian is a person who follows the religion of Christ (Christ+ian). A musician is someone who plays music (music+ian). Probably the most widely used of these words is politician (politic+ian). By analogy to this word, people divided the word wrong as polit+ician, and treated -ician as a suffix in such relatively new words as mortician (mort+ician), or beautician (beaut(y)+ician). Similar misdivisions have created the suffix -aholic, as in "shopaholic" from a misdivision of alcoholic as alc+oholic rather than the correct alcohol+ic.
There are two suffixes used to mean "one who." These suffixes are "-ian" and "-an." They can also mean "one that (is)" and "related to."