I don't know, maybe there are. I only read the original arabic text but never looked for an english translation of it.
Judging from linguistic evidence they appear to have come from the lamu archipelago and their closest linguistic kin's are the bajuuni people. They could very well be asiatic traders who've became swahilifide in the lamu archipelago and afterword's settled the somali coast. Also every foreigner who comes from the arabian coast or asia to settle in barawa usually joins the chimini people much like the hatimis who claim to have come from the al-andalus.
By the way the overall size of the chimini people historically speaking were very small, for example in the 1875 they were around 20% of the inhabitants of barawe meaning less than a thousand the rest being somalis.