Flann

{{Use dmy dates|date=April 2022}}

{{distinguish|Flan (disambiguation){{!}}Flan}}

{{Infobox name

| name = Flann

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| pronunciation = {{IPAc-en|f|l|æ|n}} {{respell|FLAN}}

| gender = male/female

| masculine = Flann/Flannan

| feminine = Flann/Flannaid

| meaning = from the Irish meaning 'red-haired'

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| origin = Irish

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| variant forms = Flannan, Flannaid

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| name day = 15 December}}

Flann is both an English surname and an Irish masculine given name, but has also been used as a feminine given name.{{cite web|title=Index of Names in Irish Annals: Flann|url=http://medievalscotland.org/kmo/AnnalsIndex/Feminine/Flann.shtml|publisher=Medieval Scotland|access-date=16 August 2013}}

It might refer to:

• Flann Fína mac Ossu, another name for King Aldfrith of Northumbria (died 704 or 705)
• Flann mac Lonáin (died 896), Irish poet
• Flann Sinna (died 916), also called Flann mac Maíl Sechnaill, High King of Ireland
• Flann Mainistrech (died 1056), Irish scholar
• Flann O'Brien, a pen name used by Irish writer Brian O'Nolan (1911–1966)

FLANN, an acronym for Fast Library for Approximate Nearest Neighbors, is a C++ library for approximate nearest neighbor search in high-dimensional spaces.Arul Suju, Hancy Jose, [https://ieeexplore.ieee.org/document/8085676 FLANN: Fast approximate nearest neighbour search algorithm for elucidating human-wildlife conflicts in forest areas] {{doi|10.1109/ICSCN.2017.8085676}}