I have absolutely no idea where this list originated, in the folder it was simply the list itself, and I honestly don't remember how or when I saved it. If you know the source, let me know so I can update the post and give credit to the originating source.
Symbols and Meanings for the Vanir
boar - the primary sacred animal of Frey, Freya, and Nerthus.
wain - Frey, Freya, Nerthus, and Holda were all said to have wagons or chariots.
ship - Frey and Njord have ships, and Nehelennia is associated with ships also.
stag/antler - Frey carries an antler, Ullr is associated with hunting, and Herne is antlered.
sunwheel - for the changing of the seasons, and the four primary Vanir (Frey, Freya, Njord, Nerthus)
Ing rune - for Ing-Frey
Jera rune - to symbolize the year and the cycles of growth and harvest
Fehu rune - for prosperity, particularly as given by Frey and Freya
Wunjo rune - for joy, and the fruitfulness and plenty of the Vanir
Uruz rune - for Eir, or Nerthus; healing and strength as given by the Vanir
oak tree/leaf - Several Vanatruar associate Frey with the oak tree.
acorn - The acorn, having a phallic shape, and being a seed, can be seen as a Frey "lingam".
walnuts/other nuts - associated with Frey's fertility.
phallus - Associated with the Frey cult.
seagull, albatross - Njord's sacred birds.
footprint/s - Njord's feet.
cats of all kinds - a sacred animal of Freya.
cow/cattle - a sacred animal of Nerthus.
wheat sheaf - sacred to Frey and Nerthus, and possibly Sif.
fish, dolphins/porpoise - sacred to Njord.
flax - sacred to Holda.
goose - sacred to Holda.
white feather - associated with Holda.
snowflake - for Holda and Skadhi
dog - sacred to Nehelennia.
wolf - associated with Ullr and Skadhi.
bear - some associate the bear with Ullr.
cornucopia - sacred to Nehelennia, and a general Vanic symbol of abundance.
swan - sacred to Njord.
shells - sacred to Njord and possibly Freya (as Mardoll).
bow & arrow - Ullr's weapon of choice.
oath ring - associated with Frey, Njord, and Ullr.
axe - Njord's weapon of choice.
boar helm & shield - symbolic of the Vanir as protective Gods, and worn by tribes dedicated to Ing and Nerthus.
rowan tree - sacred to Sif.
briar-rose - associated with Holda.
corvid - associated with Holda.
skull - associated with Holda (Hel).
apples - sacred to Idunna.
eggs - sacred to Eostre.
hares - sacred to Eostre.
goldenrod - sacred to Sif
various berries, esp. blackberry/elderberry - associated with Holda, and possibly Nerthus.
bees - associated with Frey through Byggvir and Beyla.
snowshoes - worn by Ullr and Skadhi.
yew tree - sacred to Ullr.
mountains - Skadhi's preferred place of residence.
ocean wave - Njord's element.
flame - for Gullveig.
sword - carried by Frey before giving it up to carry an antler.
spear - associated with Gullveig.
wand - for Frey or Gullveig.
pine tree - associated with the Vanir, and shared UPG also connects it with Frey and Ullr
horse - horses were traditionally kept in Frey's honour.
bells - bells were traditionally worn by Frey's priests.
anvil - associated with Wayland Smith.
sickle - associated with Nerthus.
birch - sacred to Nerthus (and possibly Holda).
broom or rake - associated with Holda.
scales - associated with Frodi as Keeper of Time.
hourglass - also associated with Frodi.
sun - for Sunna or Dagr
moon - for Mani or Nott
star - for Nott or Star Mother