From en.wiktionary.org:
[reef]
** English
*** Etymology
Borrowed from North [en], possibly related to [de], or otherwise from obsolete
[de] (from [en]).
*** Proper noun
[s]
1. [en] .
**** Statistics
- According to the 2010 United States Census, _Reef_ is the 38214 <sup> th </sup> most common surname in the United States, belonging to 580 individuals. _Reef_ is most common among White (91.03%) individuals.
*** Further reading
- [R:en:DAFN]
** Luxembourgish
*** Etymology
From [lb] and [lb], from [lb], from [lb]. Cognate with [de], [nl], [en],
[is].
*** Pronunciation
- [lb]
- [lb]
*** Noun
[m]
1. hoop (metal band on a barrel)
2. [lb] hoop