Consonant Cluster Classes

I was always told that I can't use interjections or onomatopoeia or names as a good source of linguistic data about a language, certainly at least its standard form and function, but there is a lot of insight that I think these can illustrate. In particular, lately I've been looking at two aspects of the sound system of English (you will see a good number of posts on this topic), and there are some quirks that came up in debate. So, with syllable onsets, we created a chart that had the purpose of illustrating what are viable syllable onsets, but some debate arose over what counts as an acceptable cluster and what doesn't.

First, there are some clusters deemed to be perfectly viable for English onsets that only have a few words in English (and their derivatives). THW (thwart), DW (dwindle, dwarf, dwell). GW was deemed /not/ to be included on this list despite having many perfectly accepted loan words, mostly for plants, animals, and foods (guava, guanabana, guacamole, guar (gum), guano) several perfectly accepted place names (Guam, Guatemala) and even the name Gwen, and its variants.

Now, I'm not here to say that we should not consider THW legit, it still has some uses in English (thwomp, thwack, thwip) but I think that GW needs to be considered in some kind or organizational group. I propose three categories of distinction for these clusters. First, native cluster, where the effective requirement is that there is at least one "native" word which has this cluster, and all the better if you have some other words (like Dwight and Dwayne the names). Second, viable clusters, ones that seem to be perfectly fine for usage, maybe sound a little foreign, but nobody would have trouble saying them, preferably with some kind of attestation that isn't a loanword (such as the band Gwar or the Mushroomhead song Bwomp). The third catergory would include clusters that are quite unlikely to occur in English, such as TL, VW, or SR. Perhaps a fourth category could be used to account for certain unusual clusters that effectively produce a closed class of words, such as the PF in the interjections pff and pfaugh