Moreover their names alliterate, suggesting that they were indeed brothers.
From the en.wikipedia.org
The second stressed syllable of the off-verse does not usually alliterate with the others.
From the en.wikipedia.org
The poems, like the majority of extant Anglo-Saxon verse, are composed in alliterative meter, with four strong stresses per line, three of which must alliterate.
From the en.wikipedia.org
More examples
Use alliteration as a form of poetry
(alliterative) having the same consonant at the beginning of each stressed syllable; "alliterative verse"
(Alliteracy) Aliteracy (sometimes spelled alliteracy) is the state of being able to read but being uninterested in doing so. ...
Alliteration is a stylistic literary device identified by the repeated sound of the first consonant in a series of multiple words, or the repetition of the same sounds in stressed syllables of a phrase. "Alliteration" from the Latin word u201Cliterau201D, meaning u201Cletters of the alphabetu201D, and the first known use of the word to refer to a literary device occurred around 1624...
(alliteration) The repetition of consonants at the beginning of two or more words immediately succeeding each other, or at short intervals; The recurrence of the same letter in accented parts of words, as in Anglo-Saxon alliterative meter
(alliteration) poetic device; the first consonant sounds or in words or syllables are repeated.
(Alliteration) An instance in which two or more words in close proximity begin with the same sound.
(Alliteration) The same consonant sounds at the beginning of words in a sentence or a line of poetry. For example, the sound of P in Peter Piper picked a peck of pickled peppers.
(Alliteration) A series of words in a sentence all beginning with the same sound. For example: Sing a song of six-pence.