General tracking:
* Spjörðsmaður: This literally means "spear-man" but could be used figuratively for someone who follows tracks, especially for hunting.
* Fylgjusmaður: This means "follower" or "companion" and could be used for someone who follows trails or tracks someone.
* Leitarmaður: This means "seeker" and could be used for someone who actively searches for something, like a tracker.
Specific skills:
* Sporleikari: This combines "spor" (track) and "leikari" (player, performer) and might be used for someone skilled at reading tracks.
* Vetrmaður: This literally means "winter man" and could be used for someone skilled in navigating and surviving in winter conditions, which often involves tracking.
More metaphorical options:
* Hjarta veiðimanns: This means "heart of a hunter" and could be used to express the skills and dedication of a tracker.
* Öxl vargs: This means "shoulder of a wolf" and could be used to express the stealth and cunning of a tracker.
The best word to use depends on the context and specific meaning you want to express.
It's important to note that Old Norse lacked a single word for every modern English concept. The use of metaphors and figurative language was common, so you might need to choose the word that best fits the specific situation.