Recently, an editor using the IP address of 197.156.95.9 made the following comment on my talk page: "...as I've seen in the article Abiy Ahmed, he's in 15th prime minister, not fourth. In addition, the person full name describes in bold. There is million people who have a name "Abiy". Otherwise it's seems like disruption or vandalism due to ambiguous office holding position. If he is in fourth position, it should be supported by reliable sources."
Recently, an IP editor made the unsourced change from 4th to 15th.
There is a tradition for biographies of living persons in the English language Wikipedia to only use the shortened form of an individuals name after the first mention (in bold).
Although Abiy may be regarded as the 15th head of government of modern Ethiopia, the "Federal Democratic Republic of Ethiopia’s Office of the Prime Minister" currently states on its website page: "H.E. Abiy Ahmed Ali (PhD) is the fourth Prime Minister of the Federal Democratic Republic of Ethiopia"[1] and I sincerely believe that the government website is a reasonably reliable source.--BushelCandle (talk) 00:54, 6 June 2019 (UTC)
References
"Prime Minister". The Federal Democratic Republic of Ethiopia’s Office of the Prime Minister. Retrieved 6 June 2019. H.E. Abiy Ahmed Ali (PhD) is the fourth Prime Minister of the Federal Democratic Republic of Ethiopia