The source Campbell cites is the article on the Algonquin from the Handbook of North American Indians but the source that article cites which luckily I have is Gordon Day s 1972 article from the International Journal of American Linguistics The Name Algonquin IJAL 38 4 226 228 Apparently etymology deriving the name from a putative Mikmaq term algoom e aking at the place of spearing fish and eels etymology comes from J N B Hewitt in the Handbook of American Indians NB not the same as the Handbook of North American Indians which is late 1970s present the first vol of the Handbook of American Indianswhere this etymology appearedis from like 1905 Day refers to Hewitt as the Bureau of American Ethnology s Iroquoianist and says of the proposed etymology Hewitt s form appears to end in a locative i e ing thus agreeing with his translation but a locative is not appropriate after a verb root and if ing is a locative it is not a Micmac type locative It is not clear where the k comes from It may be observed moreover that although a people may derive its name from the name of a place a place name is not the name of a people He goes on to mention a number of other possible etymologiessome apparently his own guesses as to potential sources from each of the languages spoken by Indians Champlain was with when he first recorded the name rather than theories which had previously appeared in the literature Champlain first recorded the name at Tadoussac in 1603 so if that s where he first heard the word Day says it would have come from the Algonquins Montagnais or an Etchemin unfortunately the French applied the name Etchemin to a bunch of different Algonquian speaking groups though Day here identifies them mainly with the Maliseet and Abenaki Because Algonquin and Montagnais lacked the phoneme l at the time but Maliseet did have it Day guesses the word came from Maliseet and suggests the word quoted in the WP article as the most probable origin of the name but he never claims he s proven anything Personally I m not particularly convinced by his evidence but obviously that s unimportant for Wikipedian purposes in any event his suggestion seems to be the one most frequently cited in recent literature Besides Campbell and the HNAI there s Bill Bright s Native American Placenames of the United States which the Online Etymology Dictionary cites alongside the algoomeaking theory The Random House Dictionary and thus dictionary com whose Algonquian related etymologies were written by Ives Goddard simply says presumably an Algonquian language At least some other dictionaries just mention the algoomeaking theory as the OED does from personal experience I ll warn that dictionaries in general but the OED in particular tend to be quite bad when it comes to Indian etymologies But of course that s irrelevant for Wikipedia s purposes You re probably right that the alternate theory should be mentioned in the article given its prominence in respectable and widely consulted dictionaries