These E predictions are shaky, indeed. That said, the Etruscans did occasionally depict some sub-Saharan Africans/Ethiopians in their art. Matter of fact, the Carthaginians hired many Nubian/Ethiopian individuals as elephants handlers/mahouts or archers for their army. And they also traded with sub-Saharan Africans. It's believed that the Carthaginians even interacted with SSAs from the Coast of West Africa. So who knows, maybe these Em2 and other exotic E could be validated. However, this current Etruscan Paper didn't mention individuals with SSA ancestry.
Here a coin from Etruria.
Arretium, Etruria. The Chiana Valley. Circa 208-207 BC. AE Quartuncia. Negro head right / Indian elephant standing right, bell around neck; M below. SNG ANS 39-41; BMC 19.
This coin was found in 1800s, like others of this type, we do not know the archaeological context and meaning, not even the location of the find is 100% certain. Initially connected to the Punic Wars, there are also other hypotheses. So it's really risky to use it to make anthropological assumptions like you are doing.
"Description
ETRURIA, Arretium (?), The Chiana Valley.
ETRURIA, Arretium (?), The Chiana Valley. Circa 208-207 BC. Æ Quartuncia (5.34 gm). Head of an African right / Indian elephant standing right, bell around neck; M below. SNG ANS 39-41; BMC Italy pg. 15, 19; SNG Copenhagen 47; Robinson, NumChron 1964, pl. V; SNG Morcom 45; Laffaille 1. Good VF, well centered, choice dark green patina. Rare. Exceptionally well preserved and probably one of the finest known of the type. ($750)
This enigmatic issue has been much discussed. It was Sestini in 1816 who first indicated their area of circulation in and around the Chiana (Clanis) valley and lake Trasimeno, dominated by the cities of Arezzo, Chiusi and Cortona. The traditional attribution of the issue to 217 BC, as representing the propaganda of Hannibal’s approach to Etruria, was modified by Robinson (op. cit.), who saw it as a provocative seditious type of Arretium, which was in a state of high tension with Rome in 209/8, in the hoped for arrival of Hasdrubal from Spain with reinforcements. However, the reverse depicts an Indian rather than African elephant with a bell around its neck reminiscent of the elephant/saw aes signatum issue (Crawford 9/1) of about 250-240 BC and associated with the battle of Maleventum (soon to be called Beneventum) in 275 BC when the captured elephants of Pyrrhus were brought to Rome in triumph. A similar Indian elephant is also depicted as a symbol on the Tarantine nomos issue (Vlasto 710-712), indicating the presence of Pyrrhus in the city in 282-276. The Barcid coinage of New Carthage (Villaronga CNH, pg. 65, 12-15) and that of Hannibal in Sicily (SNG Cop. 382) clearly depict African elephants belonging to the elephant corps from about 220 BC. As Maria Baglione points out in "Su alcune parallele di bronzo coniato," Atti Napoli 1975, pg.153-180, the African/elephant issue shares control marks with other cast and struck Etruscan coins of the region, she quotes Panvini Rosati in ‘ Annuario dell’accademia Etrusca di Cortona XII’, 1964, pg. 167ff., who suggests the type is to be seen as a moneyer’s badge or commemorative issue in the style of Caesar’s elephant/sacrificial implements issue of 49/48 BC (Crawford 443/1). The elephant, an attribute of Mercury/Turms, is an emblem of wisdom and is also a symbol of strength and of the overcoming of evil."
Unclear and unlikely. In previous studies bone remains were analyzed from Adria which is in Veneto.