ون

ـُونَ • (-ūna) m

1. Nominative-case (marfūʿ) suffix used to pluralize masculine nouns and adjectives referring to people. In Classical Arabic, with full ʾiʿrāb, appears as ـُونَ‎ (-ūna). Note that most masculine nouns and adjectives referring to people, especially shorter ones, are not pluralized in this fashion, but use a broken plural instead. Furthermore, non-human masculine nouns don't use this suffix, either forming a broken plural or using the "feminine" suffix ـَات‎ (-āt).
2. Nominative-case (marfūʿ) suffix used very occasionally to pluralize non-human nouns, including some that are feminine, such as سَنَة‎ (sana, “year”), plural سِنُون‎ (sinūn).
3. -ty

• ـِينَ‎ (-īna) (for the accusative and genitive cases)

From English van.

ون • (van) (plural ون‌ها‎ (van-hâ))

1. van

From Middle Persian wn' (wan, “tree”).

ون • (van)

1. ash tree

From Arabic

ـون • (-un)

1. (rare, literary) A suffix forming the plural of nouns (usually of Arabic origin) ending in ـی (-i)

• انقلابیون‎ (enqelâbiyyun)
• روحانیون‎ (rowhâniyyun)
• افراطیون‎ (efrâtiyyun)
• اعتدالیون‎ (e'tedâliyyun)
• ملیون‎ (melliyyun)
• اجتماعیون‎ (ejtemâ'iyyun)
• جبریون‎ (jabriyyun)
• اختیاریون‎ (extiyâriyyun)
• الهیون‎ (elâhiyyun), الاهیون‎ (elâhiyyun)
• مادیون‎ (mâddiyyun)
• طبیعیون‎ (tabi'iyyun)
• داعشیون‎ (dâ'ešiyyun)