Tavish sits next to 4 phonetic neighbors — Travis, Hamish, and Angus are the closest matches by sound. Most share Tavish's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"twin"
"river"
"true, faithful, trustworthy"
"short form of Beckett (bee cottage)"
"one who weaves cloth"
"fortress, military camp"
"relating to time or the hours"
"far-sighted, young (if from Cyrus)"
"the ruby gemstone"
"of the sea, the pool"
"long hill, ridge settlement"
"light, illumination"
"old power, noble ruler"
"village of the Danes"
"Yahweh has been gracious"
"divine judge"
"from the Cayman Islands"
"see, the son"
"griffin (mythical creature symbolizing strength)"
Similar sound: These names share phonetic patterns with Tavish — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Aramaic via Scottish Gaelic origins, giving them the same cultural heritage as Tavish.
Rhythm: Tavish is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.