The identity of the Highgate Vampire is dealt with on pages 50-51 of the Gothic Press edition of The Highgate Vampire book.
Its text speaks of "a mysterious nobleman from the Continent who arrived in the wake of the vampire epidemic which had its origins in south-east Europe."
The conjecture that he might be Eastern European is therefore more than likely.
Above is a circa 1870s photograph of the Russian immigrant known variously as Mikhail Oleg Ostrog, Bertrand Ashley, Claude Clayton (Cayton), Dr Grant, Max Grief Gosslar, Ashley Nabokoff, Orloff, Count Sobieski, Max Sobiekski etc, possibly from the Kiev region of Russia, but by no means a nobleman, who settled in the East End area of London in the 1860s. His name has been put forward by some searching for the identity of the Highgate Vampire. It is rumoured without any clear evidence that Mikhail Ostrog moved to the Highgate area of London in the 1890s, but there is no mention made of him after 1904. Mikhail Ostrog was under investigation by the Russian authorites for what we would describe today as a series of vampiric murders. Mikhail Ostrog was also investigated by the fledgling Metropolitan Police service over a series of murders that bore all the hallmarks of vampiric attack in the Greater London Area. Mikhail Ostrog was introduced to the public in Donald McCormick's The Identity of Jack the Ripper (1962). From that time little was known until recent research by D S Goffee revealed a wealth of information on his criminal career. This information was published in the October 1994 issue of Ripperana, "The Search for Michael Ostrog." Phil Sugden also covers him as a suspect in The Complete History of Jack the Ripper (1995). Numerous people have drawn a comparison between the Highgate Vampire and "Jack the Ripper" in the past, which, while worthy of investigation, simply does not pan out.
Physical Description of Mikhail Oleg Ostrog:
Five foot, eleven inches in height.
Dark brown hair.
Often dressed in a "semi-clerical" suit.
Had a scar on right thumb and right shin
Had numerous flogging marks on his back.
Two large moles on right shoulder, one on the back of his neck.
Described as a Russian, Russian Pole, and a Polish Jew at various times.
The name Tamás Ország was presented as a much more likely candidate by those of us researching the matter in the previous century. The similarity between the surnames Ország and Ostrog is striking, but Ország originated from Hungary, not Russia, and I personally remain unconvinced that Mikhail Ostrog is a potential candidate. The identity, history and origin of the Highgate Vampire is considerably more intriguing and mysterious than a common criminal and homicidal maniac who some have tried to link to the "Ripper" murders.
The vampire's appearance in the putrid chamber of its tomb at Highgate Cemetery in August 1970 to its extirpation in the grounds of the neo-gothic derelict mansion in early 1974 is one of a heavy form, gorged and stinking with blood with eyes glazed and staring horribly, glinting with the red fire of perdition. This great leech possessed sallow, parchment-like skin beneath which a faint bluish tinge could be discerned; the colour of a three-day old corpse. It had black hair and eyebrows that were especially heavy and joined across the bridge of an aquiline nose. The mouth betrayed thin, cruel lips which drew back, almost in a snarl, to reveal sharp teeth where lodged congealed gouts of discolouring blood, the offal of the previous night's feast. Some witnesses describe a tall figure with a hideous countenance. All remark upon the eyes which burned like hot coals in a face so frightening it paralysed them in their tracks. There was also the unbearably fetid stench that accompanied this presence, rank with corruption and the stench of the charnel, which indicated an undead rather than an apparition.
The last moments, some of which were captured by a 35mm camera, reveal the same "burning, fierce eyes beneath black furrowed brows staring with hellish reflection. Yellow at the edges with blood-red centres, unlike anything imaginable. Flared nostrils connected to a thin, high-bridged nose. The mouth still set in its cruel expression with lips drawn far back as if unable to contain the sharp, white teeth." (The Highgate Vampire, pages 85, 86 & 142.)