ᛃ ᛇ ᛈ

According to Paul Cornell in Timewyrm: Revelation (pp. 157 and 190) this is the Doctor's signature in runes: -

ᛃ ᛇ ᛈ

I'm still not at all sure what he was thinking of. Jeop? Harvest, Yew and Game?

The Rune Poems are all on Wikisource here.

The three relevant verses of the Old English rune poem would be

Ger
Summer is a joy to men, when God, the holy King of Heaven,
suffers the earth to bring forth shining fruits
for rich and poor alike.

Eoh
The yew is a tree with rough bark,
hard and fast in the earth, supported by its roots,
a guardian of flame and a joy upon an estate.

Peordh
Peorth is a source of recreation and amusement to the great,
where warriors sit blithely together in the banqueting-hall.

The first rune is actually a version of Ar, the 'Aryan' rune.

The Old English futhorc of course (and for future reference) goes: -

ᚠ - feoh 'wealth'
ᚢ - ur 'aurochs'
ᚦ - thorn
ᚩo - os 'god'
ᚱ - ride
ᚳc - cenn 'torch'
ᚷȝ - gift
ᚹ - wynn 'mirth'
ᚻ - hail
ᚾ - need
ᛁ - ice
ᛄ - ger 'year, harvest'
ᛇeo - eo 'yew'
ᛈ - peorth 'game, recreation'
ᛉx - eolh 'elk-sedge'
ᛋ - sun
ᛏ - Tiw
ᛒ - birch
ᛖ - eh 'horse
ᛗ - man
ᛚ - lake
ᛝ - Ing
ᛟœ - ethel
ᛞ - day
ᚪa - oak
ᚫæ - ash
ᚣy - yr 'bow'
ᛠea - ear 'grave'