While it’s true that some of these forms are found in Art Nouveau letters, I’d call this a Victorian revival of Medieval Monastic Gothics. Similar pseudo-Lombardic shapes are seen in many releases from the late 1800s. Examples:

Armorial/Templar, 1879 (see L, R, H)

Tendril, 1878 (see O, L, R)

Faust Text, 1898

A very nice modern interpretation of this style is Litania (see the Lobardic alt caps).

Lumunari is another (more calligraphic) digital homage to High Middle Ages writing.