My heart goes out to the family. My condolences. I just prayed the below Litany for the two sons. If the family gets together with friends for prayers, you might be able to lead the Litany with simple changes, i.e., changing “the two sons” with the son’s name, and the bold or italics, etc.
In order to make it easier to follow, I changed the color of the response every time the response changes.
The Litany for the Faithful Departed

Lord, have mercy on us.
Christ, have mercy on us.
Lord, have mercy on us. Christ, hear us.
Christ, graciously hear us.
God, the Father of Heaven,
have mercy on the souls of the two sons.
God the Son, Redeemer of the world, have mercy on the souls of the two sons.
God the Holy Ghost, have mercy on the souls of the two sons…
Holy Trinity, One God, have mercy on the souls of the two sons…
Holy Mary, Mother of God,
pray for the souls of the two sons.
St. Michael, pray for the souls of the two sons.
All ye angels and archangels, pray for the souls of the two sons.
All ye orders of blessed spirits, pray for the souls of the two sons.
St. Joseph, pray for the souls of the two sons
All ye holy patriarchs and prophets, pray for the souls of the two sons
All ye holy apostles and evangelists, pray for the souls of the two sons.
All ye holy martyrs, pray for the souls of the two sons.
All ye holy bishops and confessors, pray for the souls of the two sons.
All ye holy doctors, pray for the souls of the two sons.
All ye holy priests and Levites, pray for the souls of the two sons.
All ye holy monks and hermits, pray for the souls of the two sons.
All ye holy virgins and widows, pray for the souls of the two sons.
All ye saints of God, pray for the souls of the two sons.
Be merciful.
Spare them, O Lord.
Be merciful.
Graciously hear us, O Lord.
From all evil,
O Lord, deliver them.
From the rigor of Thy justice, O Lord, deliver them.
From the power of the devil, O Lord, deliver them.
From long-enduring sorrow, O Lord, deliver them.
From cruel flames, O Lord, deliver them.
From horrible darkness, O Lord, deliver them.
From dreadful weeping and wailing, O Lord, deliver them.
Through Thy holy nativity, O Lord, deliver them.
Through Thy most sweet name, O Lord, deliver them.
Through Thy most profound humiliations, O Lord, deliver them.
Through Thy bloody sweat, O Lord, deliver them.
Through Thy scourging, O Lord, deliver them.
Through Thy crowning with thorns, O Lord, deliver them.
Through Thy carrying of the cross, O Lord, deliver them.
Through Thy most cruel death, O Lord, deliver them.
Through Thy five most holy wounds, O Lord, deliver them.
In the Day of Judgment,
we sinners beseech Thee, hear us.
Thou Who forgavest Magdalene, and didst grant the prayer of the thief,
we beseech Thee, hear us.
That Thou wouldst be pleased to deliver the souls of our parents,
…relations, friends, and benefactors, from the pains of hell,
we beseech Thee, hear us.
That Thou wouldst be pleased to have mercy on those of whom
…no special remembrance is made on earth,
we beseech Thee, hear us.
That Thou wouldst be pleased to grant them all the pardon and
…remission of their sins,
we beseech Thee, hear us.
That Thou wouldst be pleased to receive them into the company
…of the blessed,
we beseech Thee, hear us.
King of awesome majesty,
we beseech Thee, hear us.
Son of God,
we beseech Thee, hear us.
Lamb of God, Who takest away the sins of the world,
grant unto them eternal rest.
Lamb of God, Who takest away the sins of the world,
grant unto them eternal rest.
Lamb of God, Who takest away the sins of the world,
grant unto them rest everlasting.
Christ, hear us.
Christ, graciously hear us.
Lord, have mercy.
Christ, have mercy on us.
Lord, have mercy.
From the gate of hell,
deliver their soul, O Lord.
O Lord, hear my prayer.
And let my cry come unto Thee.
Let us pray.
O God,
the Creator and Redeemer of all the faithful,
grant unto the soul
s of Thy servant
s departed the remission of all
their sins;
that, by pious supplications,
they may obtain the pardon which
they have always desired.
Grant this, O God, Who livest and reignest for ever and ever. Amen.
O eternal God,
Who, besides the general precept of charity,
hast commanded a particular respect for parents, kindred, and benefactors;
grant, we beseech Thee, that, as
they were the instruments by which Thy providence bestowed on us our birth, education and innumerable other blessings, so our prayers may be the means to obtain for
them a speedy release from
their excessive sufferings, and admittance to Thine infinite joys. Through Jesus Christ, Our Lord.
Eternal rest give unto
them, O Lord.
And let the perpetual light shine upon
them.
May
they rest in peace.
Amen.
Let Nothing Disturb You
Let nothing disturb you,
Let nothing frighten you,
All things are passing away:
God never changes.
Patience,
Obtains all things,
Whoever has God
Lacks nothing:
God alone suffices.
*Santa Teresa de Jesús
(Santa Teresa de Ávila)
*
Luz Maria