This song is called Rest Easy and it's presented as being a Highland lullaby - so perhaps it has been translated from SG into English. The chorus certainly does look as if it is SG, I would like to know if it really is. Here's the complete song -

I left my baby lying there,
lying there, lying there,
I left my baby lying there,
to go and gather blaeberries.

Hovan hovan gorry og o,
Gorry og o, gorry og o,
Hovan hovan gorry og o,
I never found my baby-o

I found a wee brown otter's trail,
otter's trail, otter's trail,
I found a wee brown otter's trail,
but never found my baby-o.

Hovan hovan gorry og o ...

I heard the curlew crying high,
crying high, crying high,
I heard the curlew crying high,
but never heard my baby-o.

Hovan hovan gorry og o .....

Looks like those standard lilting syllables (o hug o ro hi a ro ho, etc.) so common in Scottish tunes.

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Not a native speaker.

Always wait for at least three people to agree on a translation, especially if it’s for something permanent.

My translations are usually GU (Ulster Irish), unless CO (Standard Orthography) is requested.

OK I've found it and it definitely is in Gàidhlig including the chorus - The Fairy Lullaby/An Cóineachan and An Cùbhrachan

It's one of those songs that probably has dozens of verses. Here are some more below.

Some notes:
-- A còineachan is a baby stolen by the faeries.
-- Not all of the "gu'n" expressions are equivalent to "gun" (= gan), because gu'n/gun can mean a number of things, and even be just a filler sound.
-- The verb goir is to crow like a cock, so goiridh-òg-o could be a form of what in English is "cock-a-doodle-do" (in French, cocorico?).

Dh'fhàg mi’n seo 'na shìneadh e,
'na shìneadh e, 'na shìneadh e.
Gu’n dh'fhàg mi'n seo 'na shìneadh e,
'nuair dh'fhalbh mi 'bhuain nam braoilegan.

Séist:
Hò-bhan, hò-bhan, goiridh òg o
goiridh òg o, goiridh òg o
Hò-bhan, hò-bhan, goiridh òg o
Gu'n dh'fhalbh mo ghaoil 's gu'n dh'fhàg e mi.

O, shiubhail mi bheinn o cheann gu ceann,
bho thaobh gu taobh, gu taobh nan allt.
O, shiubhail mi bheinn o cheann gu ceann,
cha d'fhuair mi lorg mo chòineachan.

Fhuair mi lorg an dòbhrain duinn,
an dòbhrain duinn, an dóbhrain duinn.
Gu'n d'fhuair mi lorg an dòbhrain duinn,
's cha d'fhuair mi lorg mo chòineachan.

Fhuair mi lorg na h-eal' air an t-snàmh,
na h-eal' air an t-snàmh, na h-eal' air an t-snàmh.
Gu'n d'fhuair mi lorg na h-eal' air an t-snàmh,
's cha d'fhuair mi lorg mo chòineachan.

Fhuair mi lorg na lach' air an lòn,
na lach' air an lòn, na lach' air an lòn.
Fhuair mi lorg na lach' air an lòn,
cha d'fhuair mi lorg mo chòineachan.

Fhuair mi lorg an laoigh bhric dheirg,
an laoigh bhric dheirg, an laoigh bhric dheirg;
Gu'n d'fhuair mi lorg an laoigh bhric dheirg,
's cha d'fhuair mi lorg mo chòineachan.

S d'fhuair mi lorg 'na bà 'sa pholl,
na bà 'sa pholl, na bà 'sa pholl.
Fhuair mi lorg na bà 'sa pholl,
cha d'fhuair mi lorg mo chòineachan.

Fhuair mi lorg a' cheò 'sa 'bheinn,
a' cheò 'sa bheinn, a' cheò 'sa bheinn;
Ged fhuair mi lorg a' cheò 'sa bheinn,
Cha d'fhuair mi lorg mo chòineachan.

I left my baby lying there,
lying there, lying there,
I left my baby lying there,
to go and gather blaeberries.

Chorus:
Hovan, hovan gorry og o,
gorry og o, gorry og o.
Hovan, hovan, gorry og o,
my love went and left me.

I searched the mountains from peak to peak,
from side to side, to the sides of the burns.
I searched the mountains from peak to peak,
but I found no trace of my baby, oh.

I found the wee brown otter’s track,
the wee brown otter, the wee brown otter.
I found the wee brown otter’s track,
but I found no trace of my baby, oh.

I found the track of the swan on the water, [or maybe "a-swimming"]
the swan on the water, the swan on the water.
I found the track of the swan on the water,
but I found no trace of my baby, oh.

I found the track of the duck on the pond,
the duck on the pond, the duck on the pond.
I found the track of the duck on the pond,
but I found no trace of my baby, oh.

I found the track of the little red calf,
the little red calf, the little red calf.
I found the track of the little red calf,
but I found no trace of my baby, oh.

I found the track of the cow in the mire,
the cow in the mire, the cow in the mire.
I found the track of the cow in the mire,
but I found no trace of my baby, oh.

I found the trail of the mountain mist,
the mountain mist, the mountain mist.
I found the trail of the mountain mist,
but I found no trace of my baby, oh.

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.