Adolf may have been a Swedish royal name but the terrible dictatorship of Adolf Hitler has ruled out this name Adolf for any sensible parent. In the US last year, there were more than 100 boys' given the Spanish variation Adolfo and a handful given the old school Adolphus, but none named Adolf or Adolph....thank goodness.

Adolf

World War II stamped a permanent verboten on Adolph. 

Adolph

This softer version of Adolf is sadly still off-limits due to the connotations with Hitler.

Adolphus

Adalwolf

Agilulf

Aigolf

Aigulf

Aigulphe

Aistulf

Aldwulf

Ardolph

Ariulf

Arnolph

Arnulf

Arnulfus

Athaulf

Aunulf

Aygulf

Bardolph is an antiquated German name that was used by Shakespeare for several minor characters. Short form Bardo, a Buddhist term for a Limbo-like state, would be more familiar and more fashionable today.

Bardolph

This ancient name is that of the hero of the epic Beowulf, which is thought to be the oldest-ever poem in English lit written in the vernacular. J. R. R. Tolkien used the poem as one of his inspirations for The Lord of the Rings.

Certainly a weighty if historically relevant choice, but usable for a modern baby? Even a few years ago, we might have said no. But Beowulf Sheehan is a noted portrait photographer, Beowulf Borritt a Broadway production designer, and the nicknames Wulf or Wulfie are feeling positively mainstream.

With other ancient names from myth and legend coming to life once again, Beowulf is certainly up for consideration.

Beowulf

Barsanulphe

Bernulf

Bernulph

Bertulfe

Bertulphe

Bladulf

Bladulph

Blidulf

Blidulph

Botolph

Botulph

Botwulf

Cenwulf

Ceolwolf

Chlodulf

Clodulf

Cuthwulf

Dulf

Dölf

Eadwulf

Ealdwulf

Eardulf

Eardwulf

Ecgwulf

Edulf

Ernulf

Ferdulf

Fredulf

Fridulph

Frodulph

Gandolf and variant Gandulf are legitimate names used in medieval Europe, including by several bishops and dukes. From it comes the name of Castel Gandolfo, the pope's summer residence. However, to most people this will feel like a misspelling of the wizard Gandalf.

Gandolf

Gangolf

Gangulphus

Gelulf

Gerlof

Gerolf

Gingolph

Gisulf

Gisulfus

Gondulf

Gondulfus

Gondulphus

Grasulf

Guelph

Gundulf

Gundulph

Hidulf

Hidulph

Hidulphus

Hildulfus

Hludwolf

Hrodulf

Hrothulf

Hydulph

Ingolf

Ingulf

Ingulph

Kenulph

Ludolph

Lyonulph

Lyulph

Maynolf

Meinolf

Meinulph

Monulph

Odulf

Odwulf

Ordwulf

Oswulf

Pardulf

Pardulfus

Pardulph

Pardwulf

Ralf

Ralph has two diametrically different images: there's the suave Ralph Fiennes-type Brit (often pronounced Rafe), and then there's the Jackie Gleason blue-collar, bowling blowhard Ralph Kramden bus driver. It's all in the eye of the beholder, though its hip factor did rise when it was chosen for his son by cool U.K. actor Matthew Macfadyen.
 Ralph is a name that's been around for a thousand years, was in the Top 30 from the 1870s to the 1920s, and just could make a comeback. It's already in the UK Top 100.
 Ralph has a number of notable namesakes, from Ralph Waldo Emerson to Ralph Abernathy to Ralph Lauren. In literature, Ralph is a Shakespearean name, appearing in Henry IV, is a pivotal figure in Henry James's The Portrait of a Lady and Ralph was one of the three main boys in Lord of the Flies. And let's not forget Ralphie in A Christmas Story.
 Or you might prefer the French version--Raoul.

Ralph

Randel

Randolf

Randolph is a timeworn classic that had its last hurrah in the 1940s, when Randolph (born George) Scott was starring in westerns, but then was probably done in by its tricky nickname Randy (which, strangely enough, was itself a Top 50 name in the fifties and sixties).
 In the UK, the name Randolph has been associated with the Churchill family; in the US, Randall has taken precedence. Trivia note: Randolph S. Parker III is the birth name of Trey Parker, the creator of South Park, whose nickname-name derives from his being the third Randolph in the family.

Randolph

An old name still occasionally heard in the U.K., but still and perhaps forever a foreigner in the U.S.  Can be spelled Ranulf.

Ranulph

Rodolf

vintageluvs's list "Germanic Wolf Boys" of 147 great name ideas: Adolf - Wulfwine!

Germanic Wolf Boys

Names that contain the element wulf, meaning "wolf" in German, or its cognates wolf in Anglo-Saxon and úlfr in Scandinavian. 